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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A. capture
B. picture
C. ensure
D. pleasure Đáp án là: C. ensure </s>
|
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<s> Chọn đáp án đúng với câu hỏi: John congratulated us _______ our exam with high marks.
A. on passing
B. for passing
C. to pass
D. on pass Đáp án là: A. on passing </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho 13.(23+22)−3.(17+28)=? Chọn đáp án đúng:
A. 450
B. -450
C. 150
D. 132 Đáp án là: C. 150 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một khung dây hình tam giác vuông có độ dài cạnh huyền là 10cm và một cạnh góc vuông là 8cm. Cả khung dây được đưa vào từ trường đều sao cho các đường sức từ vuông góc với khung dây, từ thông xuyên qua khung dây là 1, 2.10 − 7 W b. Cảm ứng từ B có giá trị:
A. 10 − 4 T
B. 5.10 − 5 T
C. 2, 5.10 − 5 T
D. 2.10 − 5 T Đáp án là: B. 5.10 − 5 T </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Thầy giáo Công gửi vào ngân hàng 10 triệu đồng theo hình thức lãi kép với kì hạn 4 tháng. Biết rằng lãi suất của ngân hàng là 0,5%/tháng. Hỏi sau 2 năm thầy giáo thu được số tiền lãi gần nhất với số nào sau đây?
A. 1.262.000đ
B. 1.271.000đ
C. 1.272.000đ
D. 1.261.000đ Đáp án là: A. 1.262.000đ </s>
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Những tình huống nào dưới đây cần viết biên bản?
A. Đơn xin nghỉ ốm.
B. Đơn tường trình khi một nhóm học sinh tự ý đi tham quan khi chưa được phép của thầy cô và cha mẹ.
C. Lớp em đề xuất đi tham quan bảo tàng dân tộc học.
D. Ghi lại diễn biến và kết quả Đại hội Đoàn trường. Đáp án là: D. Ghi lại diễn biến và kết quả Đại hội Đoàn trường </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nhận định sau ứng với nội dung chủ yếu của văn bản nào? “Số phận bi thảm của người nông dân cùng khổ và những phẩm chất tốt đẹp của họ đã được thể hiện qua cái nhìn thương cảm và sự trân trọng của nhà văn”
A. Tôi đi học
B. Trong lòng mẹ
C. Tức nước vỡ bờ
D. Lão Hạc Đáp án là: D. Lão Hạc </s>
|
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1,
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Một chất quang dẫn có giới hạn quang điện là 1, 88 μ m. Lấy c = 3.10 8 m / s. Hiện tượng quang điện trong xảy ra khi chiếu vào chất này ánh sáng có tần số nhỏ nhất là
A. 1,452.10 14 Hz.
B. 1,596.10 14 Hz.
C. 1,875.10 14 Hz.
D. 1,956.10 14 Hz. Đáp án là: B. 1,596.10 14 Hz. </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
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1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Về mặt tự nhiên, Trung Á không có đặc điểm nào dưới đây?
A. Giàu có về tài nguyên thiên nhiên.
B. Khí hậu lục địa khô hạn.
C. Nhiều đồng bằng châu thổ đất đai giàu mỡ.
D. Các thảo nguyên thuận lợi cho thăn thả gia súc. Đáp án là: C. Nhiều đồng bằng châu thổ đất đai giàu mỡ. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Ianta - địa điểm được chọn để tổ chức hội nghị Ianta là
A. n ơi đóng quân của nước Đức phát xít bị Hồng quân Liên Xô tiêu diệt.
B. địa danh thuộc lãnh thổ của Trung Quốc.
C. vùng thuộc địa của nước Anh ở Ấn Độ.
D. địa danh thuộc lãnh thổ của Liên Xô. Đáp án là: D. địa danh thuộc lãnh thổ của Liên Xô </s>
|
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1,
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1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
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1,
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1,
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1,
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Sắp xếp các số sau theo thứ tự tăng dần: −2021;4;0;−10;−1
A. −2021;−10;4;0;−1
B. −2021;−10;−1;0;4
C. −2021;−10;0;−1;4
D. 4;0;−1;−10;−2021 Đáp án là: B. −2021;−10;−1;0;4 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Which of the following statements can be inferred from the first paragraph?
A. Women talk more in some situations, men talk more in others.
B. Men and women have different styles of talking, which may begin in childhood.
C. According to Deborah Tannen, the belief that women talk more is partly right but most wrong and oversimplified.
D. Men are more sociable than women. Đáp án là: A. Women talk more in some situations, men talk more in others. </s>
|
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1
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<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different sound in the part underlined.
A. y ou ng
B. pl ou gh
C. c ou ple
D. c ou sin Đáp án là: B. pl ou gh </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Gieo ba đồng xu cân đối, đồng chất. Xác suất để có đúng hai đồng xu xuất hiện mặt sấp là:
A. 1/8.
B. 3/8.
C. 1/4.
D. 7/8. Đáp án là: B. 3/8. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Lý do cơ bản nào khiến các đề nghị cải cách không thể trở thành hiện thực?
A. Chưa hợp thời thế.
B. Rập khuân hoặc mô phỏng nước ngoài.
C. Điều kiện nước ta có những điểm khác biệt.
D. Triều đình bảo thủ, cự tuyệt, đối lập với mọi thay đổi. Đáp án là: D. Triều đình bảo thủ, cự tuyệt, đối lập với mọi thay đổi </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho ba đa thức A(x) = x^2 − 3x +10; B(x) = 3x^3 + 16; C(x) = 2x^4 − 4x^2 − 8x.
Tính A(x) − B(x) − C(x).
A. −2x^4 − 3x^3 + 5x^2 + 5x − 6;
B. 2x^4 + 3x^3 − 3x^2 − 11x + 26;
C. −2x^4 − 3x^3 − 3x^2 + 5x − 6;
D. −2x^4 − 3x^3 + 5x^2 − 11x − 6. Đáp án là: A. −2x^4 − 3x^3 + 5x^2 + 5x − 6; </s>
|
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<s> Chọn đáp án đúng với câu hỏi: People have _______ when they get older.
A. much cells
B. fewer cells
C. few cell
D. plenty of cell Đáp án là: B. fewer cells </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. question
B. education
C. prediction
D. communication Đáp án là: A. question </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Trong các cách sau cách nào làm giảm lực ma sát?
A. tăng độ nhám của mặt tiếp xúc
B. Tăng diện tích của mặt tiếp xúc.
C. tăng lực ép lên mặt tiếp xúc.
D. Tăng độ nhẵn của mặt tiếp xúc. Đáp án là: D. Tăng độ nhẵn của mặt tiếp xúc </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho dung dịch Ba(HCO 3 ) 2 lần lượt vào các dung dịch riêng biệt sau: CaCl 2, Ca(NO 3 ) 2, NaOH, Na 2 CO 3, KHSO 4, Na 2 SO 4, Ca(OH) 2, H 2 SO 4 và HC1. Số trường hợp tạo ra kết tủa là
A. 7
B. 5
C. 6
D. 8 Đáp án là: C. 6 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đồ thị biểu diễn sự phụ thuộc của cường độ dòng điện vào hiệu điện thế giữa hai đầu dây dẫn có dạng là:
A. Một đường thẳng đi qua gốc tọa độ
B. Một đường cong đi qua gốc tọa độ
C. Một đường thẳng không đi qua gốc tọa độ
D. Một đường cong không đi qua gốc tọa độ Đáp án là: A. Một đường thẳng đi qua gốc tọa độ </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hợp chất nào sau đây không có tính lưỡng tính?
A. ZnO
B. Zn(OH) 2
C. ZnSO 4
D. Zn(HCO 3 ) 2 Đáp án là: C. ZnSO 4 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số y = f (x) có đạo hàm trên (a; b). Phát biểu nào sau đây là đúng?
A. Hàm số y = f (x) đồng biến trên (a ; b) khi và chỉ khi f ′(x) ≥ 0 "x Î (a; b) và f ′(x) = 0 tại hữu hạn giá trị x Î (a; b);
B. Hàm số y = f (x) đồng biến trên (a ; b) khi và chỉ khi f ′(x) < 0 "x Î (a; b);
C. Hàm số y = f (x) đồng biến trên (a ; b) khi và chỉ khi f ′(x) £ 0 "x Î (a; b);
D. Hàm số y = f (x) đồng biến trên (a ; b) khi và chỉ khi f ′(x) ≥ 0 "x Î (a; b); Đáp án là: A. Hàm số y = f (x) đồng biến trên (a ; b) khi và chỉ khi f ′(x) ≥ 0 "x Î (a; b) và f ′(x) = 0 tại hữu hạn giá trị x Î (a; b); </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu đúng
A. Phân số 11/12 viết được dưới dạng số thập phân hữu hạn
B. Phân số 74/500viết được dưới dạng số thập phân vô hạn tuần hoàn
C. Phân số 2/33viết được dưới dạng số thập phân hữu hạn
D. Phân số 11/45 viết được dưới dạng số thập phân vô hạn tuần hoàn Đáp án là: D. Phân số 11/45 viết được dưới dạng số thập phân vô hạn tuần hoàn </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một lớp học có nhiều học sinh yêu thích thể thao. Trong ngày hội thể thao của trường, lớp đã có 1/2 số học sinh đăng kí thi đấu bóng đá, 2/5 số học sinh đăng kí thi đấu bóng chuyền, 11/20 là số học sinh đăng kí thi đấu kéo co và 3/10 số học sinh đăng kí thi đấu cầu lông. Hãy cho biết môn thi đấu nào được học sinh đăng kí nhiều nhất và môn thi đấu nào được học sinh đăng kí ít nhất (một học sinh có thể thi đấu nhiều môn).
A. Nhiều nhất là kéo co và ít nhất là bóng đá.
B. Nhiều nhất là kéo co và ít nhất là cầu lông.
C. Nhiều nhất là bóng chuyền và ít nhất là bóng đá.
D. Nhiều nhất là cầu lông và ít nhất là bóng chuyền. Đáp án là: B. Nhiều nhất là kéo co và ít nhất là cầu lông. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Điểm cực Nam của khung hệ tọa độ địa lí nước ta ở vĩ độ
A. 8°35'N.
B. 8°34N.
C. 8°33N.
D. 8°32N. Đáp án là: B. 8°34N. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The word “ preferred ” paragraph 2 is closed in meaning to _____.
A. favored
B. available
C. ordinary
D. required Đáp án là: A. favored </s>
|
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1715,
18916,
29901,
319,
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5025,
4395,
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2,
2
] |
[
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Ý nghĩa nào sau đây không phải của đường Hồ Chí Minh đối với vùng Bắc Trung Bộ?
A. Thúc đẩy sự phát triển các huyện phía tây.
B. Góp phần phân bố lại dân cư.
C. Hình thành mạng lưới đô thị mới.
D. Tạo động lực phát triển dải ven biển. Đáp án là: D. Tạo động lực phát triển dải ven biển </s>
|
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1,
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1,
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1,
1,
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1,
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1,
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1,
1,
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1,
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1,
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1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Frankly, I’d rather you _____ anything about it for the time being.
A. don’t do
B. hadn’t done
C. didn’t do
D. haven’t done Đáp án là: C. didn’t do </s>
|
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] |
[
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 23, hãy cho biết hệ thống cảng sông có ở những hệ thống sông nào sau đây?
A. Hồng - Thái Bình, Thu Bồn
B. Hồng - Thái Bình, Đà Rằng
C. Hồng - Thái Bình, Mê Kông - Đồng Nai
D. Hồng - Thái Bình, Cả Đáp án là: C. Hồng - Thái Bình, Mê Kông - Đồng Nai </s>
|
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1,
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho ∆ABC = ∆MNP (c – g – c). Đỉnh A và B của tam giác ABC tương ứng với đỉnh nào của tam giác MNP?
A. N và P;
B. M và N;
C. M và P;
D. N và M. Đáp án là: B. M và N; </s>
|
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Trong rổ có 50 quả cam. Số táo bằng \(\frac{9}{{10}}\) số cam và số cam bằng \(\frac{{10}}{{11}}\) số xoài. Hỏi có tất cả bao nhiêu quả cam, táo và xoài?
A.150 quả
B.100 quả
C.145 quả
D.140 quả Đáp án là: A.150 quả </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Anilin (C 6 H 5 NH 2 ) có phản ứng với dung dịch:
A. NaOH
B. Na 2 CO 3
C. NaCl
D. HCl Đáp án là: D. HCl </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Theo mẫu nguyên tử Bo thì trong nguyên tử Hidro, bán kính quỹ đạo dừng của electron trên các quỹ đạo là r n = n 2 r 0, với r 0 = 0,53.10-10 m; n = 1, 2, 3,... là các số nguyên dương tương ứng với các mức năng lượng của các trạng thái dừng của nguyên tử. Gọi v là tốc độ của electron trên quỹ đạo K. Khi nhảy lên quỹ đạo M, electron có tốc độ bằng
A. v 9
B. v 3
C. v 3
D. 3v Đáp án là: C. v 3 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The passage implies that guyots were first detected by means of ______.
A. a fathometer
B. computer analysic
C. a deep-sea diving expedition
D. research submarines Đáp án là: A. a fathometer </s>
|
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<s> Chọn đáp án đúng với câu hỏi: I nfluenced by the work of Malthus, Darwin came ____ a theory of natural selection and gradual evolution over time.
A. off
B. into
C. out
D. up with Đáp án là: D. up with </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Điều khoản nào của Hiệp định Pari năm 1973 có ý nghĩa quyết định đối với sự phát triển của cuộc kháng chiến chống Mĩ, cứu nước?
A. Hai bên ngừng bắn và giữ nguyên vị trí ở miền Nam.
B. Nhân dân miền Nam tự quyết định tương lai chính trị.
C. Các bên thừa nhận thực tế ở miền Nam có hai chính quyền.
D. Hoa Kì rút hết quân viễn chinh và quân các nước đồng minh. Đáp án là: D. Hoa Kì rút hết quân viễn chinh và quân các nước đồng minh </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Gọi S là tập tất cả các giá trị nguyên dương của m sao cho hàm số y=√(−m^2x^2+2(m)x+3) xác định trên (1/3;2/3). Khi đó số các phần tử của S là.
A. 0
B. 2
C. 4
D. 5 Đáp án là: D. 5 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm nổi bật nhất của các xí nghiệp, nhà máy trong quá trình chuyển đổi từ “nền kinh tế chỉ huy sang kinh tế thị trường” ở Trung Quốc là
A. được chủ động hơn trong việc lập kế hoạch và tìm thị trường tiêu thụ sản phẩm.
B. được tự do trao đổi mọi sản phẩm hàng hóa với thị trường trong nước và thế giới.
C. được nhận mọi nguồn vốn FDI của nước ngoài và được chia đều trên toàn quốc.
D. được nhà nước chủ động đầu tư, hiện đại hóa thiết bị và trang bị vũ khí quân sự. Đáp án là: A. được chủ động hơn trong việc lập kế hoạch và tìm thị trường tiêu thụ sản phẩm. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nhận xét nào sau đây không đúng với miền Tây Bắc và Bắc Trung Bộ?
A. Miền duy nhất có địa hình cao ở nước ta với đủ ba đai cao
B. Địa hình núi chiếm ưu thế với các dãy núi hướng tây bắc – đông nam
C. Địa hình núi chiếm ưu thế với các dãy núi hướng vòng cung
D. Có nhiều bề mặt sơn nguyên, cao nguyên, lòng chảo... Đáp án là: C. Địa hình núi chiếm ưu thế với các dãy núi hướng vòng cung </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Người ta tổng hợp một mARN từ một hỗn hợp nuclêôtít có tỉ lệ A: U: G: X = 4: 3: 2: 1. Nếu sự kết hợp trong quá trình tổng hợp là ngẫu nhiên thì tỷ lệ bộ ba mã có chứa nuclêôtít A là:
A. 65,8%
B. 52,6%
C. 72,6%
D. 78,4% Đáp án là: D. 78,4% </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Polime nào sau đây không phải là polime thiên nhiên
A. thủy tinh hữu cơ.
B. xenlulozơ.
C. protein.
D. cao su tự nhiên. Đáp án là: A. thủy tinh hữu cơ. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Các vùng Đông Nam Á, Nam Á, Tây Á thuộc phạm vi ảnh hưởng của quốc gia nào theo quy định của Hội nghị Ianta (2-1945)?
A. Liên Xô, Mĩ, Anh.
B. Các nước phương Tây từng chiếm đóng ở đây.
C. Hoa Kỳ, Anh, Pháp.
D. Anh, Đức, Nhật Bản. Đáp án là: B. Các nước phương Tây từng chiếm đóng ở đây. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Bảng dưới đây ghi lại hiện tượng khi làm thí nghiệm với các chất sau ở dạng dung dịch nước: X, Y và Z Các chất X, Y và Z lần lượt là:
A. Benzylamin, glucozơ và saccarozơ
B. Glyxin, glucozơ và fructozơ.
C. Anilin, glucozơ và fructozơ.
D. Anilin, fructozơ và saccarozơ. Đáp án là: C. Anilin, glucozơ và fructozơ. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Các tia sáng xanh tím kích thích quá trình:
A. Tổng hợp cacbohiđrat.
B. Tổng hợp lipit.
C. Tổng hợp prôtêin.
D. Tổng hợp ADN. Đáp án là: C. Tổng hợp prôtêin. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Vì sao châu Nam Cực được phát hiện và nghiên cứu muộn nhất?
A. Nằm cách xa các châu lục khác.
B. Ít người sinh sống.
C. Kinh tế kém phát triển.
D. Không giao lưu với các châu lục khác. Đáp án là: A. Nằm cách xa các châu lục khác. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Để dử dụng nhiên liệu hiệu quả cần cung cấp lượng oxi:
A. Dư.
B. Tùy trường hợp.
C. Thiếu.
D. Vừa đủ. Đáp án là: D. Vừa đủ </s>
|
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<s> Chọn đáp án đúng với câu hỏi: “Make good use of your time. You won’t get such an opportunity again” said he to me.
A. He let me make use of my time because I wouldn’t get an opportunity again.
B. He advised me to make use of my time as I wouldn’t get an opportunity again.
C. He ordered me to make use of my time saying that I wouldn’t get an opportunity again
D. He offered me such an opportunity so that I could make good use of my time. Đáp án là: B. He advised me to make use of my time as I wouldn’t get an opportunity again. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào đánh dấu chủ nghĩa xã hội đã vượt ra khỏi phạm vi một nước trở thành một hệ thống thế giới?
A. Thắng lợi của cách mạng Trung Quốc (1949)
B. Thắng lợi của cuộc cách mạng dân chủ nhân dân ở các nước Đông Âu
C. Thắng lợi của cách mạng Việt Nam (1945)
D. Thắng lợi của cách mạng Cuba (1959) Đáp án là: B. Thắng lợi của cuộc cách mạng dân chủ nhân dân ở các nước Đông Âu </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Hình nào xác định đúng chiều dòng điện cảm ứng khi chon am châm dịch chuyển lại gần hoặc ra xa vòng dây kín?
A.
B.
C.
D. Đáp án là: B. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khu vườn trồng mía của nhà bác Minh ban đầu có dạng hình vuông biết chu vi hình vuông là 20 (m) sau đó mở rộng bên phải thêm y (m) phía dưới thêm 10x(m) nên mảnh vườn trở thành hình chữ nhật. Tính chu vi của khu vườn sau khi được mở rộng theo x, y
A. y + 5
B. 8x + 5
C. 2y + 16x + 20
D. 4x + 8y Đáp án là: C. 2y + 16x + 20 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Ở tiết mục nhảy theo cặp đôi của đội cổ vũ, số người của đội cổ vũ được xếp vừa hết. Khi biểu diễn theo nhóm, mỗi nhóm 5 người, thì vừa đủ người. Đội cổ vũ có bao nhiêu người, biết rằng số người của đội khoảng 26 đến 31.
A. 29;
B. 30;
C. 28;
D. 27. Đáp án là: B. 30; </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho ancol A có cấu tạo là Tên gọi của A là
A. 4-metylpentan-2-ol.
B. 2-metylpentan-l-ol.
C. 4-metylpentan-l-ol.
D. 3-metylpentan-2-ol. Đáp án là: C. 4-metylpentan-l-ol. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho cân bằng: N 2 ( k ) + 3 H 2 ( k ) ⇋ 2 N H 3 ( k ) Khi tăng nhiệt độ thì tỉ khối của hỗn hợp khí thu được so với H 2 giảm. Phát biểu đúng về cân bằng này là
A. Phản ứng thuận tỏa nhiệt, cân bằng chuyển dịch theo chiều nghịch khi tăng nhiệt độ
B. Phản ứng thuận thu nhiệt, cân bằng chuyển dịch theo chiều thuận khi tăng nhiệt độ
C. Phản ứng nghịch thu nhiệt, cân bằng chuyển dịch theo chiều thuận khi tăng nhiệt độ
D. Phản ứng nghịch tỏa nhiệt, cân bằng chuyển dịch theo chiều nghịch khi tăng nhiệt độ Đáp án là: A. Phản ứng thuận tỏa nhiệt, cân bằng chuyển dịch theo chiều nghịch khi tăng nhiệt độ </s>
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] |
<s> Chọn đáp án đúng với câu hỏi: Thành tựu trong lĩnh vực tài chính trong 5 năm (1986 – 1990) là
A. Phát hành tiền mới.
B. Cung cấp đủ vốn cho hoạt động sản xuất và kinh doanh
C. Đã kiềm chế được một bước lạm phát.
D. Giữ được tỉ giá dồng Việt Nam với các đồng tiền khác. Đáp án là: C. Đã kiềm chế được một bước lạm phát. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho 17,4 gam hỗn hợp 2 amin đơn chức bậc I có tỷ khối so với không khí bằng 2. Tác dụng với dung dịch FeCl 3 dư thu được kết tủa, đem nung kết tủa đến khối lượng không đổi được m gam chất rắn. Giá trị của m là
A. 16,0 gam
B. 10,7 gam
C. 24,0 gam
D. 8,0 gam Đáp án là: D. 8,0 gam </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Giả sử M, m lần lượt là giá trị lớn nhất, giá trị nhỏ nhất của hàm số y=x+1/(x) trên (1/2 ; 3). Khi đó 3M+m bằng bao nhiêu?
A. 7/2
B. 35/6
C. 10
D. 12 Đáp án là: D. 12 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Tia sáng song song với trục chính của thấu kính hội tụ thì tia ló sẽ
A. đi qua tiêu điểm vật chính.
B. truyền thẳng.
C. đi qua tiêu điểm ảnh chính.
D. song song với trục chính. Đáp án là: C. đi qua tiêu điểm ảnh chính. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là ý nghĩa tích cực của việc sử dụng đồng tiền chung ơ-rô ở EU?
A. Xóa bỏ cách biệt kinh tế - xã hội giữa các nước.
B. Nâng cao sức cạnh tranh của thị trường.
C. Xóa bỏ những rủi ro khi chuyển đổi tiền tệ.
D. Tạo thuận lợi cho việc chuyển giao vốn Đáp án là: A. Xóa bỏ cách biệt kinh tế - xã hội giữa các nước. </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
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1,
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1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
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1,
1,
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1,
1,
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1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
1,
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1,
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1,
1,
1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Don’t be late for the interview, ____ people will think you are a disorganized person
A. unless
B. otherwise
C. if not
D. or so Đáp án là: B. otherwise </s>
|
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2,
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[
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Make sure you __________________ us a visit when you are in town again.
A. give
B. do
C. pay
D. have Đáp án là: C. pay </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho đoạn văn sau: "Những người con gái Hoa kiều bán hàng xởi lởi, những người Chà Châu Giang bán vải, những bà cụ già người Miên bán rượu, với đủ các giọng nói líu lô, đủ kiểu ăn vận sặc sỡ, đã điểm tô cho Năm Căn một màu sắc độc đáo hơn tất cả các xóm chợ vùng rừng Cà Mau”. Đoạn văn trên có mấy phó từ?
A. 1
B. 2
C. 3
D. 4 Đáp án là: A. 1 </s>
|
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1,
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Năm 2014, nước ta có dân số là 90,7 triệu người,diện tích tự nhiên phần đất liền là 331212 km 2, vậy mật độ dân số nước ta là
A. 237,8 người/km 2
B. 373,8 người/km 2
C. 283,8 người/km 2
D. 273,8 người/km 2 Đáp án là: D. 273,8 người/km 2 </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Ở một loài thực vật có 2n = 24 NST. Trong loài xuất hiện một thể đột biến đa bội có 36 NST. Theo lí thuyết, phát biểu nào sau đây sai?
A. Thể đột biến này có thể trở thành loài mới.
B. Thể đột biến này là thể tam bội.
C. Thể đột biến này được phát sinh do rối loạn nguyên phân của hợp tử.
D. Thể đột biến này thường sinh trưởng nhanh hơn dạng lưỡng bội. Đáp án là: C. Thể đột biến này được phát sinh do rối loạn nguyên phân của hợp tử. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: As a result, certain (6 ) _______ materias such as timber, water and minerals are beginning to (7 ) _______ short.
A. turn
B. come
C. go
D. run Đáp án là: D. run </s>
|
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<s> Chọn đáp án đúng với câu hỏi: One of the fundamentals of education. mathematics is taught from the earliest grades in school.
A. basics
B. understandings
C. needs
D. points Đáp án là: A. basics </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Read the text below and choose the best answer for each question after the text. Many people like to keep pets. Dogs and cats are very popular pets. Some people, however, keep birds or goldfish. They need less space and are easier to look after. If you want to have a pet, you can buy one from a pet shop but you must be careful not to buy a sick animal. It is best if you know something about the pet you want. This helps you choose a healthy pet. However, if you do not have much money and know very little about animals, you can visit the Royal Society for the Prevention of Cruelty to Animals (RSPCA). The first society for the Prevention of Cruelty to Animals was founded in England in 1821. It was set up to make sure that all animals are treated with kindness. The RSPCA in Hong Kong carries out this aim. The RSPCA officers collect animals which have no homes and are left in the street. They look after them until they are healthy again. People visiting the RSPCA may choose their pets from these animals and you can be sure that you will get a healthy pet. If later your pet becomes ill, you can take it to the doctors at the RSPCA for treatment. When you have a pet, it is very important that you look after it properly. You must remember to feed it at suitable times. You should also give it a clean and comfortable place to rest. Your pet will be happy and healthy if you love it and care for it properly. According to the passage, what kind of pet needs more space?
A. A dog
B. A bird
C. A goldfish
D. A mouse Đáp án là: A. A dog </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khoanh tròn vào phương án sai
A. Trong tam giác vuông đường trung tuyến ứng với cạnh huyền và bằng nửa cạnh huyền.
B. Trong tam giác, đường trung tuyến với với một cạnh và bằng nửa cạnh ấy thì tam giác đó là tam giác vuông.
C. Trong tam giác vuông, đường trung tuyến ứng với cạnh góc vuông không bằng cạnh ấy.
D. Trong tam giác vuông, đường trung tuyến ứng với cạnh huyền thì vuông góc với cạnh huyền. Đáp án là: D. Trong tam giác vuông, đường trung tuyến ứng với cạnh huyền thì vuông góc với cạnh huyền </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Bài thơ Sang thu được viết theo thể thơ nào?
A. Lục bát
B. Ngũ ngôn
C. Song thất lục bát
D. Thất ngôn tứ tuyệt Đáp án là: B. Ngũ ngôn </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The word “ overtaken ” in line 19 is closest in meaning to______.
A. surpassed
B. inclined
C. expressed
D. applied Đáp án là: A. surpassed </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án đúng:Biểu thức rút gọn và giá trị của biểu thức:E=5x(1−x)−8(x^2−3) tại x = 2 là:
A. E=−11x+24;E=2
B. E=−13x^2+5x+24;E=−18
C. E=−10x+24;E=4
D. E=−12x+24;E=0 Đáp án là: B. E=−13x^2+5x+24;E=−18 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nội năng của khối khí tăng 10J khi truyền cho khối khí một nhiệt lượng 30J. Khi đó khối khí đã
A. sinh công là 40J.
B. nhận công là 20J.
C. thực hiện công là 20J.
D. nhận công là 40J. Đáp án là: C. thực hiện công là 20J. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là nguyên nhân chung dẫn tới sự thất bại của các phong trào đấu tranh ở Trung Quốc cuối thế kỉ XIX- đầu thế kỉ XX?
A. Sự câu kết giữa triều đình Mãn Thanh với các nước đế quốc
B. Thiếu một tổ chức lãnh đạo thống nhất với đường lối đấu tranh đúng đắn
C. Chưa kết hợp cả nhiệm vụ chống đế quốc và chống phong kiến
D. Chỉ phát triển trong một bộ phận giai cấp và tầng lớp nhất định Đáp án là: C. Chưa kết hợp cả nhiệm vụ chống đế quốc và chống phong kiến </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là sai?
A. Hợp kim Cu-Ni dùng chế tạo chân vịt tàu biển.
B. Nước cứng là nước có chứa nhiều cation Ca 2+, Mg 2+.
C. Cho kim loại Fe nguyên chất vào dung dịch H 2 SO 4 loãng xảy ra ăn mòn điện hóa học.
D. Phèn chua có công thức phân tử K 2 SO 4.Al 2 (SO 4 ) 3.24H 2 O. Đáp án là: C. Cho kim loại Fe nguyên chất vào dung dịch H 2 SO 4 loãng xảy ra ăn mòn điện hóa học. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: ______ I had brought my laptop to the meeting yesterday.
A. If
B. If only
C. Even if
D. As if Đáp án là: B. If only </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đốt cháy 0,1 mol hỗn hợp P gồm hợp chất X và Y (phân tử đều có C,H, O,N) thì thu được 0,25 mol C O 2 và 0,0625 mol N 2. Vậy X và Y là 2 chất nào dưới đây?
A. glixin và axit glutamic.
B. glixin và CH 3 - CH( A NH 2 ) - COONH 4.
C. glixin và CH 3 -CH(NH 2 )-COONH 3 CH 3.
D. glixin và alanin. Đáp án là: A. glixin và axit glutamic. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nội dung nào dưới đây là sự khái quát về chính sách đối ngoại của Liên Xô từ sau Chiến tranh thế giới thứ hai đến giữa những năm 70 của thế kỷ XX?
A.Bảo vệ hòa bình, ủng hộ phong trào cách mạng thế giới.
B.Giúp đỡ các nước trong hệ thống xã hội chủ nghĩa.
C.ủng hộ phong trào giải phóng dân tộc trên thế giới.
D.Chống lại âm mưu gây chiến của các thế lực thù địch. Đáp án là: A.Bảo vệ hòa bình, ủng hộ phong trào cách mạng thế giới. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: After quite some time spent waiting, their is no sign of your bags and you begin to consider the possibility that they may have gone (1) _________. What should you do?
A. lost
B. missing
C. absent
D. misplaced Đáp án là: B. missing </s>
|
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<s> Chọn đáp án đúng với câu hỏi: According to the passage, what are the basic conditions for learning online?
A. A smart phone and a 4-G sim card
B. A computer and the Internet
C. A goal and learning efforts
D. A content and the wish to learn Đáp án là: B. A computer and the Internet </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Choose the correct answer A, B, C, or D for each of the gaps to complete the following text. Television first came some sixty years ago in the 1950s. Nowadays, it is one of the most (1)...... sources of entertainment for both the old and the young. Television brings (2)........ for children, world news, music and many other (3).......... If someone likes sports, he can just choose the right sports (4)............ It is not difficult for us to see why (5)............ is a TV set in almost every home today. Điền vào số 1
A. cheap
B. expensive
C. popular
D. exciting Đáp án là: C. popular </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Điểm tương đồng trong công cuộc cải cách – mở cửa ở Trung Quốc với công cuộc cải tổ ở Liên Xô và đổi mới đất nước ở Việt Nam là
A. tiến hành cải tổ về chính trị, cho phép đa nguyên đa đảng.
B. lấy phát triển kinh tế làm trọng tâm, mở rộng hội nhập quốc tế.
C. đều tiến hành khi đất nước lâm vào tình trạng không ổn định, khủng hoảng kéo dài.
D. Đảng Cộng sản nắm quyền lãnh đạo, kiên trì theo con đường xã hội chủ nghĩa. Đáp án là: C. đều tiến hành khi đất nước lâm vào tình trạng không ổn định, khủng hoảng kéo dài. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Which is not mentioned about the Red Cross Society of China?
A. It is a strong organization.
B. It gets on well with the American Red Cross.
C. It supplied the earthquake victims a lot of things except tents.
D. It has extensive experience responding to disasters. Đáp án là: C. It supplied the earthquake victims a lot of things except tents. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Khi làm thí nghiệm với photpho trắng, cần tuân theo điều chú ý nào dưới đây
A. Cầm P trắng bằng tay có đeo găng cao su
B. Ngâm P trắng vào chậu nước khi chưa dùng đến
C. Tránh cho P trắng tiếp xúc với nước
D. Có thể để P trắng ngoài không khí Đáp án là: B. Ngâm P trắng vào chậu nước khi chưa dùng đến </s>
|
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 30, cho biết các trung tâm công nghiệp nào sau đây ở vùng kinh tế trọng điểm phía Nam không có ngành sản xuất vật liệu xây dựng?
A. Tân An, Mỹ Tho.
B. Thủ Dầu Một, Biên Hòa.
C. TP. Hồ Chí Minh, Vũng Tàu.
D. Biên Hòa, Vũng Tàu. Đáp án là: A. Tân An, Mỹ Tho. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho các nhân tố: (1) Đột biến. (2) Giao phối ngẫu nhiên. (3) Chọn lọc tự nhiên. (4) Di - nhập gen. (5) Các yếu tố ngẫu nhiên. Có bao nhiêu nhân tố trên có thể làm tăng tính đa dạng di truyền của quần thể?
A. 2
B. 3
C. 1
D. 4 Đáp án là: B. 3 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một loài thực vật có bộ nhiễm sắc thể 2n. Có bao nhiêu dạng đột biến sau đây làm thay đổi số lượng nhiễm sắc thể trong tế bào của thể đột biến? I. Đột biến đa bội. II. Đột biến đảo đoạn nhiễm sắc thể. III. Đột biến lặp đoạn nhiễm sắc thể. IV. Đột biến lệch bội dạng thể một.
A. 3
B. 1
C. 2
D. 4 Đáp án là: C. 2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Phân tử khối trung bình của cao su tự nhiên là 105000. Số mắt xích gần đúng của loại cao su trên là
A. 1544
B. 1454
C. 1640
D. 1460 Đáp án là: A. 1544 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Brown is a very ______ man in business matters. He even runs several companies in the city.
A. possible
B. able
C. probable
D. feasible Đáp án là: B. able </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Vào ngày 9-9 Tocotoco có chương trình khuyến mại khi mua trà sữa dưới hai hình thức như sau:
Hình thức 1: Giảm giá 5 000 đồng mỗi cốc.
Hình thức 2: Mua 2 tặng 1.
Theo em mua hàng theo hình thức nào sẽ lợi hơn về giá. Biết bình thường mỗi cốc trà sữa có giá 25 000 đồng.
A. Hình thức 1.
B. Hình thức 2.
C. Cả hai như nhau.
D. Cả ba đáp án đều sai. Đáp án là: B. Hình thức 2. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Văn bản Đấu tranh cho một thế giới hòa bình có nội dung gì?
A. Nói về nguy cơ chiến tranh hạt nhân đe dọa tới sự sống của nhân loại.
B. Sự tốn kém của cuộc chạy đua vũ trang cướp đi sự phát triển của nhân loại.
C. Biện pháp ngăn chặn, xóa bỏ nguy cơ chiến tranh hạt nhân.
D. Tất cả các đáp án trên. Đáp án là: D. Tất cả các đáp án trên </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Thủy tinh hữu cơ plexiglas là loại chất dẻo rất bền, trong suốt, có khả năng cho gần 90% ánh sáng truyền qua nên được sử dụng làm kính ô tô, máy bay, kính xây dựng, kính bảo hiểm,.... Polime dùng để chế tạo thủy tinh hữu cơ có tên gọi là:
A. Poli (metyl metacrylat).
B. poli acrilonitrin.
C. poli (etylen terephtalat).
D. poli (hexametylen ađipamit). Đáp án là: A. Poli (metyl metacrylat). </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
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1,
1,
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1,
1,
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1,
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1,
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1,
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Một sợi dây dài 24 748 cm. Người ta cắt đi \(\frac{1}{4}\) sợi dây đó. Hỏi sợi dây đó còn lại số xăng-ti-mét là:
A. 6 187cm
B. 18 561cm
C. 19 373cm
D. 20 024cm Đáp án là: B. 18 561cm </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Gọi M là một điểm thuộc đoạn EF. Biết EM = 3cm, EF = 7cm. Độ dài của đoạn MF là:
A. 10cm
B. 4cm
C. 3cm
D. 7cm Đáp án là: B. 4cm </s>
|
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Câu thơ: Bác Dương thôi đã thôi rồi Nước mây man mác ngậm ngùi lòng ta. ( Khóc Dương Khuê, Nguyễn Khuyến) Đã sử dụng biện pháp tu từ gì?
A. Nói quá
B. Nói giảm, nói tránh
C. Nhân hóa
D. Ẩn dụ Đáp án là: B. Nói giảm, nói tránh </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một loài thực vật, alen A quy định thân cao trội hoàn toàn so với alen a quy định thân thấp. Cơ thể tứ bội giảm phân chỉ sinh ra giao tử lưỡng bội, các giao tử lưỡng bội có khả năng thụ tinh bình thường. Thực hiện phép lai P: AAaa x aaaa thu được F 1. Tiếp tục cho F 1 lai phân tích thu được F a. Theo lí thuyết, F a có tỉ lệ kiểu hình:
A. 2 cây thân cao : 1 cây thân thấp.
B. 17 cây thân cao : 19 cây thân thấp.
C. 8 cây thân cao : 1 cây thân thấp.
D. 43 cây thân cao : 37 cây thân thấp. Đáp án là: B. 17 cây thân cao : 19 cây thân thấp. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Transportation (64) ______ teams of athletes to compete in national and international sports contests
A. brings
B. fetches
C. enables
D. gets Đáp án là: C. enables </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Lời khuyên chính từ truyện ngụ ngôn "Đeo nhạc cho mèo"?
A. Không được hèn nhát
B. Không được viển vông
C. Không thiếu trách nhiệm với cộng đồng
D. Phải cân nhắc tới điều kiện và khả năng khi triển khai một công việc nào đó Đáp án là: D. Phải cân nhắc tới điều kiện và khả năng khi triển khai một công việc nào đó </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chiếu một tia sáng gồm hai bức xạ màu da cam và màu chàm từ không khí tới mặt chất lỏng với góc tới 30 o. Biết chiết suất của chất lỏng đối với ánh sáng màu da cam và ánh sáng màu chàm lần lượt là 1,328 và 1,343. Góc tạo bởi tia khúc xạ màu da cam và tia khúc xạ màu chàm ở trong chất lỏng bằng
A. 15,35'.
B. 15'35".
C. 0,26".
D. 0,26'. Đáp án là: B. 15'35". </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Công thức nào sau đây tính cảm ứng từ tại tâm của một vòng dây tròn có bán kính R mang dòng điện I trong không khí là
A. B = 2.10 - 7. I R
B. B = 2 π. 10 - 7. I R
C. B = 2 π. 10 - 7. I. R
D. B = 4 π. 10 - 7. I R Đáp án là: B. B = 2 π. 10 - 7. I R </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: The word “they” in the first paragraph refers to _______.
A. people
B. years
C. dogs
D. wolves Đáp án là: D. wolves </s>
|
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