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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 that differs from the other three in the position ofprimary stress in each of the following questions.
A. temperature
B. direction
C. pollution
D. condition Đáp án là: A. temperature </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Sử dụng máy tính bỏ túi để tính: √(2) (làm tròn đến chữ số thập phân thứ 2).
A. 1,42;
B. 1, 41;
C. 1,4;
D. 1,04. Đáp án là: B. 1, 41; </s>
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây sai?
A. Phân lân cung cấp nguyên tố dinh dưỡng cho cây là nguyên tố photphat.
B. Phân đạm cung cấp nguyên tố dinh dưỡng cho cây là nguyên tố Nitơ.
C. Trong phản ứng giữa N 2 và O 2 thì vai trò của N 2 là chất oxi hóa
D. Tất cả các muối nitrat đều kém bên ở nhiệt độ cao. Đáp án là: C. Trong phản ứng giữa N 2 và O 2 thì vai trò của N 2 là chất oxi hóa </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho tam giác ABC có M là trung điểm của BC. Tính AB→ theo AM→ và BC→
A. AB→=AM→+1/2BC→;
B. AB→=BC→+1/2AM→;
C. AB→=AM→-1/2BC→;
D. AB→=BC→-1/2AM→; Đáp án là: C. Tính AB→ theo AM→ và BC→A. AB→=AM→+1/2BC→;B. AB→=BC→+1/2AM→; </s>
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<s> Chọn đáp án đúng với câu hỏi: Chọn khẳng định đúng:
A. Hai tứ diện đều thì đồng dạng.
B. Hai tứ diện bất kì thì đồng dạng
C. Hai hình chóp bất kì thì đồng dạng
D. Hai tứ diện đều thì bằng nhau. Đáp án là: A. Hai tứ diện đều thì đồng dạng. </s>
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2,
2
] |
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] |
<s> Chọn đáp án đúng với câu hỏi: There are many different kinds of books, so you can choose a crime novel or an autobiography, or a book (19) _____ gives you interesting information.
A. whose
B. which
C. what
D. when Đáp án là: B. which </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Điện phân dung dịch H 2 S O 4 có kết quả sau cùng là H 2 O bị phân tích thành H 2 và O 2. Sau 32 phút thể tích khí O 2 thu được là bao nhiêu nếu dòng điện có cường độ 2,5A chạy qua bình, và quá trình trên làm ở điều kiện tiêu chuẩn
A. 112 c m 3
B. 224 c m 3
C. 280 c m 3
D. 310 c m 3 Đáp án là: C. 280 c m 3 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nguyên nhân dẫn tới ô nhiễm môi trường nước ở châu Âu?
A. Do các chất thải từ hoạt động nông nghiệp.
B. Do các chất thải từ hoạt động chăn nuôi.
C. Do các chất thải từ hoạt động công nghiệp.
D. Do các chất thải từ hoạt động sản xuất và sinh hoạt. Đáp án là: D. Do các chất thải từ hoạt động sản xuất và sinh hoạt </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Ở tai giữa của chúng ta tồn tại mấy xương?
A. 5
B. 4
C. 2
D. 3 Đáp án là: D. 3 </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
] |
<s> Chọn đáp án đúng với câu hỏi: Dải đồng bằng ven biển miền Trung không phải là
A. hẹp ngang.
B. được hình thành do các sông bồi đắp.
C. bị chia cắt thành nhiều đồng bằng nhỏ.
D. chỉ có một số đồng bằng được mở rộng ở cửa sông lớn. Đáp án là: B. được hình thành do các sông bồi đắp. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Coronavirus cases are _______ to grow in the next days.
A. depended
B. expected
C. affected
D. produced Đáp án là: B. expected </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Công thức cấu tạo của chất có tên gọi sau: 4 – etyl – 3, 3 – đimetylhexan
A. C H 3 - C H 2 - C ( C H 3 ) 2 – C H ( C 2 H 5 ) – C H 2 – C H 3
B. C H 3 – C H 2 – C ( C H 3 ) 2 – C H ( C 2 H 5 ) – C H 3
C. C H 3 – C ( C H 3 ) 2 – C H 2 – C H ( C 2 H 5 ) – C H 2 – C H 3
D. C H 3 – C H ( C H 3 ) – C H 2 – C H 2 – C H 3 Đáp án là: A. C H 3 - C H 2 - C ( C H 3 ) 2 – C H ( C 2 H 5 ) – C H 2 – C H 3 </s>
|
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1,
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<s> Chọn đáp án đúng với câu hỏi: Mạch dao động ở lối vào của một máy thu thanh gồm cuộn cảm có độ tự cảm 0,3 μH và tụ điện có điện dung thay đổi được. Biết rằng, muốn thu được một sóng điện từ thì tần số riêng của mạch dao động phải bằng tần số của sóng điện từ cần thu (để có cộng hưởng). Để thu được sóng của hệ phát thanh VOV giao thông có tần số 91 MHz thì phải điều chỉnh điện dung của tụ điện tới giá trị
A. 11,2 pF.
B. 10,2 nF.
C. 10,2 pF.
D. 11,2 nF. Đáp án là: C. 10,2 pF. </s>
|
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2,
2
] |
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Người ta sử dụng phép lai phân tích nhằm:
A. Để phân biệt thể đồng hợp với thể dị hợp
B. Để nâng cao hiệu quả lai
C. Để tìm ra các cá thể đồng hợp lặn
D. Để tìm ra các cá thể đồng hợp lặn Đáp án là: A. Để phân biệt thể đồng hợp với thể dị hợp </s>
|
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1,
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Phân số nào dưới đây được biểu diễn dưới dạng số thập phân là 0,016
A. 2/125;
B. 1/125;
C. 4/125;
D. 4/25. Đáp án là: A. 2/125; </s>
|
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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: Trong mặt phẳng tọa độ cho hai vectơ a→(1;m), b→(√(3);1). Góc giữa hai vectơ a→,b→ bằng 60° khi và chỉ khi
A.m=√3/3
B.m=1/3
C. m=(-√3)/3
D.m=(-1)/3 Đáp án là: C. m=(-√3)/3 </s>
|
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2,
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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
] |
<s> Chọn đáp án đúng với câu hỏi: Cho các tập hợp M=(0;2;4),N=(1;3),P=(1;2;3;4). Khẳng định nào sau đây đúng?
A.N⊂P
B.M∪N=P
C.M⊂P
D.M∩N=P Đáp án là: A.N⊂P </s>
|
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511,
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7607,
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467,
12217,
228,
189,
182,
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302,
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865,
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13,
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31550,
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13,
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13,
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13,
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1715,
18916,
29901,
319,
29889,
29940,
31550,
29925,
29871,
2,
2
] |
[
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1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Hợp chất X có công thức cấu tạo. CH 3 CH 2 COOCH 3. Tên gọi của X là
A. metyl axetat.
B. etyl axetat.
C. metyl propionat.
D. propyl axetat. Đáp án là: C. metyl propionat. </s>
|
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[
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1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Có bao nhiêu đồng phân ancol có CTPT là C 3 H 8 O bị oxi hóa thành anđehit?
A. 1
B. 2
C. 3
D. 4 Đáp án là: A. 1 </s>
|
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1
] |
<s> Chọn đáp án đúng với câu hỏi: Giới hạn sinh thái là
A. khoảng giá trị xác định của một nhân tố sinh thái mà ở đó sinh vật có thể tồn tại, phát triển ổn định theo thời gian
B. khoảng xác định mà ở đó loài sống thuận lợi nhất hoặc sống bình thường nhưng năng lượng bị hao tổn tối thiểu
C. không chống chịu mà ở đó đời sống của loài ít bất lợi
D. khoảng cực thuận mà ở đó loài sống thuận lợi nhất Đáp án là: A. khoảng giá trị xác định của một nhân tố sinh thái mà ở đó sinh vật có thể tồn tại, phát triển ổn định theo thời gian </s>
|
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1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Around what time did the university begin to appear?
A. In the 8th century
B. In the 13th century
C. In the 9th century
D. In the 15th century Đáp án là: B. In the 13th century </s>
|
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13,
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386,
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2,
2
] |
[
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
] |
<s> Chọn đáp án đúng với câu hỏi: Sục V lít hỗn hợp A gồm etan, etilen và axetilen vào dung dịch AgNO 3 / NH 3 dư thu được 24 gam kết tủa và 6,72 lít khí B thoát ra. Toàn bộ khí B tác dụng vừa đủ với dung dịch chứa 16 gam Br 2. % thể tích etan trong hỗn hợp A là (biết thể tích khí đo ở đktc)
A. 33,33%.
B. 25%.
C. 50%.
D. 30%. Đáp án là: C. 50%. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: The quality of life these days is something most of us take for (1) _______It takes some radically different experience to bring this fact home to people.
A. given
B. accepted
C. granted
D. read Đáp án là: C. granted </s>
|
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[
1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Hô hấp tế bào là
A. quá trình tế bào lấy O 2 và giải phóng ra CO 2.
B. quá trình phân giải đường glucose thành đường 3 carbon.
C. quá trình phân giải đường thành CO 2 và nước với sự tham gia của O 2.
D. quá trình tổng hợp đường từ CO 2. Đáp án là: C. quá trình phân giải đường thành CO 2 và nước với sự tham gia của O 2. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn 10 ml một este X cần 45 ml O 2 thu được thể tích CO 2 và hơi H 2 O có tỉ lệ tương ứng là 4 : 3. Dẫn sản phẩm cháy qua bình đựng P 2 O 5 dư thấy thể tích giảm 30 ml. Biết các thể tích đo ở cùng điều kiện. Công thức của X là:
A. C 8 H 6 O 4
B. C 4 H 6 O 2
C. C 4 H 6 O 4
D. C 4 H 8 O 2 Đáp án là: B. C 4 H 6 O 2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đại hội tổng kết, biểu đương thành tích thi đua yêu nước đã chọn được:
A. 5 anh hùng.
B. 6 anh hùng.
C. 7 anh hùng.
D. 8 anh hùng. Đáp án là: C. 7 anh hùng. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho phản ứng hạt nhân C 6 12 + γ → 3 H 2 4 e Biết khối lượng của C 6 12 và H 2 4 e lần lượt là 11, 997 u và 4, 0015 u lấy 1 u = 931, 5 M e V / c 2 Năng lượng nhỏ nhất của phôtôn ứng với bức xạ γ để phản ứng xảy ra có giá trị gần nhất với giá trị nào sau đây?
A. 7Mev
B. 6MeV
C. 9MeV
D. 8MeV Đáp án là: A. 7Mev </s>
|
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<s> Chọn đáp án đúng với câu hỏi: People nod their head to say no in ___________.
A. Belgium
B. France
C. Japan
D. Bulgaria Đáp án là: D. Bulgaria </s>
|
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<s> Chọn đáp án đúng với câu hỏi: According to paragraph 3, which statement is correct about learning, unlearning and relearning?
A. Relearning something is the hardest exercise of them all.
B. Children are more suitable to unlearning process than adults.
C. Ages come with the improved ability to adapt and improvise.
D. Normal illiteracy will have disappeared by the 21 st century. Đáp án là: B. Children are more suitable to unlearning process than adults. </s>
|
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2,
2
] |
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1
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<s> Chọn đáp án đúng với câu hỏi: According to the passage, all of the following contributed to the spread of English around the world except ____________.
A. the slave trade
B. the Norman invasion
C. missionaries
D. colonization Đáp án là: B. the Norman invasion </s>
|
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[
1,
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1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different stress pattern from the other.
A. inflation
B. instruction
C. efficient
D. influence Đáp án là: D. influence </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về năng lượng của một vật dao động điều hòa, phát biểu nào sau đây là đúng?
A. Thế năng và động năng của vật được bảo toàn trong quá trình dao động.
B. Cơ năng của vật biến thiên tuần hoàn theo thời gian.
C. Động năng của vật đạt cực đại khi vật ở vị trí biên.
D. Thế năng của vật đạt cực đại khi vật ở vị trí biên. Đáp án là: A. Thế năng và động năng của vật được bảo toàn trong quá trình dao động. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Phân kali (KCl) được sản xuất từ quặng sinvinit thường chỉ có 50% K 2 O. Hàm lượng % của KCl trong phân bón đó là:
A. 39,6
B. 69,3
C. 72,9
D. 79,3 Đáp án là: D. 79,3 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hurry up or the train________ before you ca catch it.
A. will leave
B. leaves
C. will have left
D. has left Đáp án là: C. will have left </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
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
] |
<s> Chọn đáp án đúng với câu hỏi: Cho phương trình ax^2+bx+c=0 (a≠0) có biệt thức b = 2b^’;Δ'=b'^2−ac Phương trình đã cho có hai nghiệm phân biệt khi?
A. Δ' > 0
B. Δ'= 0
C. Δ'≥0
D. Δ'≤0 Đáp án là: A. Δ' > 0 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: If these prisoners attempted to escape from prison, ___ immediately.
A. they would be caught
B. they would catch
C. they will be caught
D. they will have caught Đáp án là: A. they would be caught </s>
|
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1,
1,
1
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<s> Chọn đáp án đúng với câu hỏi: Circle the word whose stress is on the first syllable.
A. several
B. imprison
C. hospital
D. educate Đáp án là: B. imprison </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Trong dãy số tự nhiên, hai số liên tiếp hơn kém nhau bao nhiêu đơn vị?
A. 1 đơn vị
B. 2 đơn vị
C. 10 đơn vị
D. 100 đơn vị Đáp án là: A. 1 đơn vị </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Este có khả năng tác dụng với dung dịch nước Br 2 là;
A. CH 2 =CHCOOH
B. HCHO
C. triolein
D. CH 3 COOCH 3 Đáp án là: C. triolein </s>
|
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Khi góc tới bằng 0°. Góc khúc xạ sẽ bằng
A. 0°
B. 30°
C. 90°
D. 180° Đáp án là: A. 0° </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khi giải thích cầu hôn : xin được lấy làm vợ là đã giải thích từ theo cách nào?
A.Dùng từ trái nghĩa với từ cần được giải thích
B.Trình bày khái niệm mà từ biểu thị
C.Dùng từ đồng nghĩa với từ cần được giải thích
D.Miêu tả hành động kết hợp với trình bày khái niệm mà từ biểu thị Đáp án là: B.Trình bày khái niệm mà từ biểu thị </s>
|
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<s> Chọn đáp án đúng với câu hỏi: _________ school fees helps many poor students have more chances to attend university
A. Slowing
B. Reducing
C. Declining
D. Dropping Đáp án là: B. Reducing </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho mạch điện như hình vẽ: Hiệu điện thế đặt vào hai điểm A, B là U AB = 30V, các điện trở R 1 = 10 Ω, R 2 = 30 Ω, R 3 = 10Ω, R 4 = 30Ω, R 5 = 50Ω. Tính cường độ dòng điện chạy qua R 5?
A. 0.
B. 1 A.
C. 0,5 A.
D. Không đủ dữ kiện. Đáp án là: A. 0. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Việc phát triển giao thông ở Đông Nam Á lục địa theo hướng Đông - Tây không thuận lợi là do
A. vùng biển lớn ngăn cách giữa các quốc gia với nhau.
B. phải phá nhiều rừng đặc dụng, rừng phòng hộ đầu nguồn.
C. không mang lại hiệu quả kinh tế - xã hội.
D. nhiều núi chạy theo hướng tây bắc - đông nam hoặc bắc - nam. Đáp án là: D. nhiều núi chạy theo hướng tây bắc - đông nam hoặc bắc - nam </s>
|
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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,
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: Khi nói về sự hình thành loài mới bằng con đường địa lý, phát biểu nào sau đây sai?
A. Hình thành loài bằng con đường địa lí là phương thức hình thành loài có ở cả động vật và thực vật
B. Cách li địa lý là nhân tố tạo điều kiện cho sự phân hoá vốn gen giữa các quần thể trong loài
C. Điều kiện địa lý là nguyên nhân trực tiếp gây ra những biến đổi tương ứng trên cơ thể sinh vật
D. Quá trình hình thành loài mới cần có sự tham gia của các nhân tố tiến hóa Đáp án là: C. Điều kiện địa lý là nguyên nhân trực tiếp gây ra những biến đổi tương ứng trên cơ thể sinh vật </s>
|
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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
] |
<s> Chọn đáp án đúng với câu hỏi: Cho dãy các chất sau: etilen (CH 2 =CH 2 ); anđehit axetic (CH 3 CHO); axetilen (HC≡CH); etyl clorua CH 3 CH 2 Cl; natri etanat (C 2 H 5 ONa ); glucozơ (C 6 H 12 O 6 ); tinh bột ( (C 6 H 10 O 5 ) n ). Số chất có thể điều chế trực tiếp ra ancol etylic bằng 1 phản ứng là
A. 7
B. 5
C. 6
D. 4 Đáp án là: B. 5 </s>
|
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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,
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1,
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1,
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1,
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Choose the correct answer A, B, C or D to complete the sentences. ________ do you go swimming with your brother?
A. How often
B. How much
C. How many
D. How long Đáp án là: A. How often </s>
|
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411,
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13,
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1128,
4049,
13,
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13,
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1128,
1784,
13,
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29889,
1128,
1472,
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30250,
29976,
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29871,
1715,
18916,
29901,
319,
29889,
1128,
4049,
29871,
2,
2
] |
[
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,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A. variety
B. influential
C. associate
D. accountancy Đáp án là: B. influential </s>
|
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2,
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] |
[
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,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Theo thuyết kiến tạo mảng, cấu tạo của thạch quyển bao gồm bao nhiêu mảng kiến tạo lớn?
A. 5.
B. 8.
C. 7.
D. 6. Đáp án là: C. 7. </s>
|
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1,
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1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Hoạt động nào dưới đây góp phần bảo vệ đường hô hấp của bạn?
A. Thường xuyên luyện tập thể dục thể thao, bao gồm cả luyện thở
B. Đeo khẩu trang trong môi trường có nhiều khói bụi
C. Trồng nhiều cây xanh
D. Tất cả các phương án đưa ra Đáp án là: D. Tất cả các phương án đưa ra </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,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Tại hai điểm A và B trên mặt chất lỏng có hai nguồn phát sóng: u A = 4 cos ω t ( c m ) và u A = 2 cos ( ω t + π / 3 ) (cm), coi biên độ sóng không đổi khi truyền đi. Tính biên độ sóng tổng hợp tại trung điểm của đoạn AB:
A. 6 cm
B. 2 cm
C. 4,6 cm
D. 5,3 cm Đáp án là: D. 5,3 cm </s>
|
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2,
2
] |
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1,
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1,
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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
] |
<s> Chọn đáp án đúng với câu hỏi: Amin CH 3 -NH-C 2 H 5 có tên gọi gốc - chức là
A. N-metyletanamin
B. metyletylamin
C. Etylmetylamin
D. propan-2-amin Đáp án là: C. Etylmetylamin </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một đoạn mạch điện xoay chiều RLC không phân nhánh, cuộn dây thuần cảm có độ tự cảm L thay đổi, điện trở thuần R = 3 Z c Z C là dung kháng của tụ). Chỉ thay đổi L cho đến khi điện áp hiệu dụng trên cuộn cảm cực đại thì
A. Hệ số công suất lớn nhất và bằng 1
B. Điện áp 2 đầu đoạn mạch chậm pha π 3 so với cường độ dòng điện
C. Điện áp 2 đầu đoạn mạch sớm pha π 3 so với cường độ dòng điện.
D. Hiện tượng cộng hưởng điện, điện áp cùng pha với cường độ dòng điện Đáp án là: C. Điện áp 2 đầu đoạn mạch sớm pha π 3 so với cường độ dòng điện. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: CLTN không có vai trò nào sau đây trong quá trình hình thành quần thể thích nghi?
A. Tạo ra các kiểu gen thích nghi
B. Tăng cường mức độ thích nghi của các đặc điểm bằng cách tích luỹ các alen qui định các đặc điểm thích nghi
C. Làm tăng số lượng cá thể có kiểu hình thich nghi tồn tại sẵn trong quần thể
D. Sàng lọc và giữ lại những cá thể có kiểu gen qui định kiểu hình thích nghi Đáp án là: A. Tạo ra các kiểu gen thích nghi </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Văn bản Lễ rửa làng của người Lô Lô do ai sáng tác?
A. Hà Thủy Nguyên
B. Phạm Thùy Dung
C. Nguyễn Vĩnh Nguyên
D. Nguyễn Văn Học Đáp án là: B. Phạm Thùy Dung </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Ba dung dịch X, Y, Z thoả mãn: - X tác dụng với Y thì có kết tủa xuất hiện; - Y tác dụng với Z thì có kết tủa xuất hiện; - X tác dụng với Z thì có khí thoát ra. X, Y, Z lần lượt là:
A. NaHCO 3, NaHSO 4, BaCl 2.
B. Al 2 (SO 4 ) 3, BaCl 2, Na 2 SO 4.
C. FeCl 2, Ba(OH) 2, AgNO 3.
D. NaHSO 4, BaCl 2, Na 2 CO 3. Đáp án là: D. NaHSO 4, BaCl 2, Na 2 CO 3 </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 sentence that best completes each of the following exchanges. Student A: “To my mind, every person is deserved to receive the same respect, regardless of gender.” Student B: “______________”
A. Sure, everyone does.
B. Sure, everyone does.
C. Sure, everyone does.
D. Sure, everyone does. Đáp án là: A. Sure, everyone does. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm nổi bật của trật tự thế giới mới được hình thành trong những năm sau Chiến tranh thế giới thứ II?
A. Là một trật tự thế giới có sự phân tuyến triệt để giữa hai phe : Xã hội chủ nghĩa và Tư bản chủ nghĩa.
B. Là một trật tự thế giới được thiết lập trên cơ sở các nước tư bản thắng trận áp đặt quyền thống trị dối với các nước bại trận.
C. Là một trật tự thế giới hoàn toàn do chủ nghĩa tư bản thao túng.
D. Là một trật tự thế giới được thiết lập trên cơ sở các nước thắng trận cùng nhau hợp tác để thống trị, bóc lột các nước bạỉ ữận và các dân tộc thuộc địa. Đáp án là: A. Là một trật tự thế giới có sự phân tuyến triệt để giữa hai phe : Xã hội chủ nghĩa và Tư bản chủ nghĩa. </s>
|
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2,
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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,
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1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho 3 kim loại Al, Fe và Cu vào 2 lít dung dịch H N O 3 phản ứng vừa đủ thu được 1,792 lít khí X (đktc) gồm N 2 và N O 2 có tỉ khối hơi so với He bằng 9,25. Nồng độ mol/lít của H N O 3 trong dung dịch ban đầu là:
A. 0,28M.
B. 1,2M.
C. 1,4M.
D. 1,7M. Đáp án là: C. 1,4M. </s>
|
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315,
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29896,
29892,
29946,
29924,
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2,
2
] |
[
1,
1,
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1,
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1,
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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,
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,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn m gam gồm ba amin đồng đẳng bằng một lượng không khí (vừa đủ), thu được 17,6 gam CO 2 ; 12,6 gam H 2 O và 69,44 lít N 2 (đktc) (biết không khí có 20% oxi và 80% nitơ về thể tích). Giá trị m là
A. 9,0 gam
B. 9,5 gam
C. 9,2 gam
D. 11,0 gam Đáp án là: A. 9,0 gam </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Quang hợp là gì?
A. Tổng hợp chất hữu cơ phức tạp từ những chất hữu cơ đơn giản, nhờ có diệp lục hấp thụ năng lượng ánh sáng mặt trời.
B. Tổng hợp chất hữu cơ phức tạp từ những chất vô cơ đơn giản, nhờ có ty thể hấp thụ năng lượng ánh sáng mặt trời.
C. Quá trình diệp lục hấp thụ ánh sáng mặt trời để tổng hợp chất hữu cơ từ nước và CO 2.
D. Quá trình diệp lục hấp thụ ánh sáng mặt trời để tổng hợp chất hữu cơ phức tạp từ các chất hữu cơ đơn giản. Đáp án là: C. Quá trình diệp lục hấp thụ ánh sáng mặt trời để tổng hợp chất hữu cơ từ nước và CO 2. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào sau đây không phải là một biến cố ngẫu nhiên?
A. Gieo xúc xắc xem xuất hiện mặt mấy chấm;
B. Đếm số quả táo trong một chiếc giỏ đựng táo;
C. Rút thẻ từ trong hộp và đọc số trên thẻ;
D. Tung một đồng xu xem xuất hiện mặt sấp hay mặt ngửa. Đáp án là: B. Đếm số quả táo trong một chiếc giỏ đựng táo; </s>
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<s> Chọn đáp án đúng với câu hỏi: Choose the best answer. If I had known you were asleep, I __________so much noise when I came in.
A. didn’t make
B. wouldn’t have made
C. won’t make
D. don’t make Đáp án là: B. wouldn’t have made </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Sự phát triển kinh tế Đại Việt thời Lê sơ không mang lại kết quả nào sau đây?
A. Ổn định tình hình xã hội
B. Củng cố nền độc lập, thống nhất của đất nước
C. Đưa Đại Việt trở thành quốc gia cường thịnh nhất Đông Nam Á
D. Thúc đẩy quá trình Bắc tiến Đáp án là: D. Thúc đẩy quá trình Bắc tiến </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khi đánh chiếm Gia Định (năm 1859), quân Pháp phải dùng thuốc nổ phá thành và rút xuống tàu chiến vì
A. trong thành không có lương thực
B. trong thành không có vũ khí
C. quân triều đình Huế phản công quyết liệt
D. các đội dân binh ngày đêm bám sát và tiêu diệt chúng Đáp án là: D. các đội dân binh ngày đêm bám sát và tiêu diệt chúng </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,
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: Tỉ số phần trăm của 13,5 và 9 là:
A. 15 %
B. 13,5 %
C. 150 %
D. 135% Đáp án là: C. 150 % </s>
|
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[
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Một oxit của lưu huỳnh trong đó oxi chiếm 50% về khối lượng. Công thức phân tử của oxit đó là
A. SO 2.
B. SO 3.
C. S 2 O 3.
D. S 2 O. Đáp án là: A. SO 2. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: ______ games that we like best are ______ tennis and football
A. The/ the
B. The/ no article
C. No article/ the
D. No article/ no article Đáp án là: B. The/ no article </s>
|
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1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Một phân tử mỡ bao gồm
A. 1 phân tử glixerol và 1 phân tử acid béo
B. 1 phân tử glixerol và 2 phân tử acid béo
C. 1 phân tử glixerol và 3 phân tử acid béo
D. 3 phân tử glixerol và 3 phân tử acid béo Đáp án là: C. 1 phân tử glixerol và 3 phân tử acid béo </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khu vực nào sau đây có rừng nhiệt đới điển hình nhất trên thế giới?
A. Việt Nam.
B. Công-gô.
C. A-ma-dôn.
D. Đông Nga. Đáp án là: C. A-ma-dôn. </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 correct answer to each of the following questions. They haven’t finished the project, ________?
A. haven’t they
B. have they
C. do they
D. don’t they Đáp án là: B. have they </s>
|
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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: Dân tộc nào dưới đây thuộc nhóm ngôn ngữ Kađai?
A. La Chí.
B. Gia Rai.
C. Hoa.
D. Hà Nhì. Đáp án là: A. La Chí. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Some of the most important books for my report is not available in the school library.
A. Some of
B. for
C. is not
D. the school library Đáp án là: B. for </s>
|
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<s> Chọn đáp án đúng với câu hỏi: _____ the crying baby into my arms, he mumbled his thanks and dashed off.
A. Delivering
B. Thrusting
C. Squeezing
D. Putting Đáp án là: B. Thrusting </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu đúng: Một vật trung hòa về điện nếu:
A. Mang nhiều điện tích dương hơn điện tích âm
B. Mang điện tích âm bằng với điện tích dương
C. Mang nhiều điện tích âm hơn điện tích dương
D. Mất bao nhiêu điện tích âm thì nhận bấy nhiêu điện tích dương Đáp án là: B. Mang điện tích âm bằng với điện tích dương </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho ba số hữu tỉ a, b, c. Nếu a < b và b < c thì
A. a < c;
B. a = c;
C. a > c;
D. a ≤ c. Đáp án là: A. a < c; </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho các hình sau đây mô tả tháp sinh khối của các hệ sinh thái dưới nước và trên cạn Nhận xét nào sau đây đúng?
A. Hình tháp 3 và 4 là hình tháp biểu hiện bậc dinh dưỡng hệ sinh thái trên cạn
B. Hình tháp 2 và 4 biểu hiện bền vững nhất
C. Hình tháp 1 và 2 là hình tháp biểu hiện bậc dinh dưỡng hệ sinh thái dưới nước
D. Hình tháp 1 và 4 là hình tháp bền vững Đáp án là: D. Hình tháp 1 và 4 là hình tháp bền vững </s>
|
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<s> Chọn đáp án đúng với câu hỏi: I learn a lot but I cannot remember anything.
A. The less I learn, the more I remember.
B. The more I learn, the less I remember.
C. I remember not only what I have learnt.
D. I learn more and more and remember more and more. Đáp án là: B. The more I learn, the less I remember. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Trong dầu gió hoặc cao dán có chứa chất metyl salixilat có tác dụng giảm đau. Chất này thuộc loại hợp chất
A. Axit
B. Este
C. Ancol
D. An đ ehit Đáp án là: B. Este </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Sự khác biệt cơ bản giữa Chiến tranh lạnh và những cuộc chiến tranh thế giới đã trải qua là
A. Chiến tranh lạnh diễn ra lâu dài, quyết liệt, không phân thắng bại.
B. Chiến tranh lạnh chủ yếu diễn ra giữa hai nước Mĩ và Liên Xô.
C. Chiến tranh lạnh diễn ra trên mọi lĩnh vực nhưng không bùng phát xung đột trực tiếp bằng quân sự.
D. Chiến tranh lạnh làm cho thế giới luôn trong tình trạng căng thẳng Đáp án là: C. Chiến tranh lạnh diễn ra trên mọi lĩnh vực nhưng không bùng phát xung đột trực tiếp bằng quân sự. </s>
|
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1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Số 6 được viết dưới dạng phân số là
A. 1/6
B. 1:6
C. 6/1
D. 6:1 Đáp án là: C. 6/1 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chất nào sau đây không phân li ra ion khi hòa tan vào nước?
A. Z n S O 4
B. HClO
C. KOH
D. C 2 H 5 O H Đáp án là: D. C 2 H 5 O H </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hệ sinh thái rừng nguyên sinh ở nước ta là
A. rừng gió mùa nửa rụng lá.
B. rừng gió mùa thường xanh.
C. rừng nhiệt đới ẩm lá rộng thường xanh
D. rừng thưa khô rụng lá. Đáp án là: C. rừng nhiệt đới ẩm lá rộng thường xanh </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The new curriculum has been designed to ______ students’ learning by combining theory with hands-on practice.
A. alleviate
B. optimize
C. sharpen
D. exaggerate Đáp án là: B. optimize </s>
|
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1,
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1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: The word " explicitly " in paragraph 2 is closest in meaning to_________.
A. clearly
B. shortly
C. slightly
D. quickly Đáp án là: A. clearly </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hình thức đấu tranh giành độc lập chủ yếu thông qua đấu tranh chính trị hợp pháp, đó là đặc điểm của phong trào giải phóng dân tộc ở
A. Châu Á
B. Châu Phi
C. Châu Mĩ La-tinh
D. Châu Á và châu Phi Đáp án là: B. Châu Phi </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm Na và Ba trong đó Na chiếm 14,375% về khối lượng. Hòa tan hoàn toàn m gam X vào nước thu được 1,344 lít khí H 2 (đktc) và dung dịch Y. Hấp thụ hoàn toàn 2,016 lít khí CO 2 (đktc) vào dung dịch Y. Các phản ứng xảy ra hoàn toàn. Khối lượng kết tủa thu được là:
A. 7,88 gam
B. 2,14 gam
C. 5,91 gam
D. 3,94 gam Đáp án là: C. 5,91 gam </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đại hội Quốc dân được tiến hành ở Tân Trào (ngày 16 - 8 - 1945) gồm những đạỉ biểu thuộc các thành phần và các miền nào?
A. Ba xứ thuộc đủ các giới, các đoàn thể, các dân tộc tiêu biểu ý chí và nguyện vọng của toàn dân.
B. Toàn thể các tầng lớp nhân dân.
C. Giai cấp tiểu tư sản, học sinh, sinh viên, trí thức cả nước.
D. Các đảng phái, đoàn thể, tổ chức, mặt trận trong cả nước. Đáp án là: A. Ba xứ thuộc đủ các giới, các đoàn thể, các dân tộc tiêu biểu ý chí và nguyện vọng của toàn dân. </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,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Châu lục tập trung dân cư đông đúc nhất thế giới là
A. châu Âu.
B. châu Á.
C. châu Mĩ.
D. châu Phi. Đáp án là: B. châu Á. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Never have people been so well informed as they are now, thanks to TV news programs.
A. Thanks to TV news programs, people are now too well informed.
B. People have been so informative thanks to TV news programs.
C. TV news programs are very informative than before and people are better informed.
D. People are better informed than they have been, thanks to TV news programs. Đáp án là: D. People are better informed than they have been, thanks to TV news programs </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Trong không gian có ba điểm OAB sao cho OA ⊥ OB và M là trung điểm của AB. Tại điểm O đặt điện tích điểm Q. Độ lớn cường độ điện trường tại điểm A,M,B lần lượt là E A, E M và E B. Nếu E A =10000V/m, E M =14400V/m thì E B bằng
A. 14400V/m
B. 22000 V/m
C. 11200 V/m
D. 5625 V/m Đáp án là: D. 5625 V/m </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: However, they also use breaching (jumping and falling back into the (48)________ with a loud splash) and pectoral fin (or flipper) and tail (or fluke) slaps (hitting the flipper or fluke on the water surface).
A. water
B. sea
C. ocean
D. river Đáp án là: A. water </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số y = 3x^4 + 2(m − 2018)x^2 + 2017 với m là tham số thực. Tìm giá trị của m để đồ thị hàm số có ba điểm cực trị tạo thành tam giác có một góc bằng 120°
A. m = −2018
B. m = −2017
C. m = 2017
D. m = 2018. Đáp án là: C. m = 2017 </s>
|
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: They are in danger of being (4)__________ because we need food, skin and other items.
A. raised
B. arrested
C. killed
D. purchased Đáp án là: C. killed </s>
|
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1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Trường hợp nào sau đây không xảy ra phản ứng hóa học?
A. Sục khí H 2 S vào dung dịch FeCl 2
B. Cho Fe vào dung dịch H 2 SO 4 loãng, nguội
C. Sục khí H 2 S vào dung dịch CuCl 2
D. Sục khí Cl 2 vào dung dịch FeCl 2 Đáp án là: A. Sục khí H 2 S vào dung dịch FeCl 2 </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Phương pháp chung để điều chế các kim loại Na, Ca, Al trong công nghiệp là?
A. Thủy luyện
B. Điện phân nóng chảy
C. Nhiệt luyện
D. Điện phân dung dịch Đáp án là: B. Điện phân nóng chảy </s>
|
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<s> Chọn đáp án đúng với câu hỏi: So với năm 1995, sản lượng điện nước ta năm 2015 tăng lên là
A. 10,74 lần.
B. 9,26 lần.
C. 9,84 lần.
D. 10,94 lần. Đáp án là: A. 10,74 lần. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một cuộn cảm có điện trở thuần R, cuộn cảm có hệ số tự cảm L và tụ điện có điện dung C mắc nối tiếp. Mắc đoạn mạch trên vào điện áp xoay chiều có tần số góc ω thay đổi được. Khi trong mạch xảy ra hiện tượng cộng hưởng thì
A. L C
B. 1 R C
C. 1 L C
D. 1 L R Đáp án là: C. 1 L C </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Thêm một chữ số 88 vào sau số tự nhiên có ba chữ số thì ta được số tự nhiên mới
A. tăng 8 đơn vị so với số tự nhiên cũ.
B. tăng gấp 10 lần và thêm 8 đơn vị so với số tự nhiên cũ.
C. tăng gấp 10 lần so với số tự nhiên cũ.
D. giảm 10 lần và 8 đơn vị so với số tự nhiên cũ. Đáp án là: B. tăng gấp 10 lần và thêm 8 đơn vị so với số tự nhiên cũ. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Tìm đẳng thức đúng trong các đẳng thức sau đây:
A. sin 20° = sin 160°;
B. cos 20° = cos 160°;
C. tan 20° = tan 160°;
D. cot 20° = cot 160°. Đáp án là: A. sin 20° = sin 160°; </s>
|
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