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<s> Chọn đáp án đúng với câu hỏi: Which of the following is TRUE as the result of global warming?
A. All people suffer from global warming.
B. All people benefit from global warming.
C. Life is more difficult for the majority of people.
D. Life is easier for most people. Đáp án là: C. Life is more difficult for the majority of people. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Số hạng không chứa x trong khai triển của (x√(x)+1/(x^4))^n với x>0 nếu biết rằng Cn2−Cn1=44 là
A. 165.
B. 238.
C. 485.
D. 525. Đáp án là: A. 165. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho este no, đa chức, mạch hở X (có công thức phân tử CxHyOz với x≤5) tác dụng với dung dịch NaOH thu được sản phẩm chỉ gồm một muối của axit cacboxylic và một ancol. Biết X có tham gia phản ứng tráng bạc. Số công thức cấu tạo phù hợp với X là
A. 3.
B. 4.
C. 1.
D. 2. Đáp án là: C. 1. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hình hộp chữ nhật ABCD.EFGH. Số các cặp mặt phẳng song song với nhau là:
A. 2
B. 3
C. 4
D. 5 Đáp án là: B. 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vị trí địa lí làm cho thiên nhiên nước ta mang tính chất
A. cận nhiệt đới trên núi.
B. cận xích đạo gió mùa.
C. nhiệt đới khô trên núi.
D. nhiệt đới ẩm gió mùa. Đáp án là: D. nhiệt đới ẩm gió mùa </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm không đúng về ngành công nghiệp trọng điểm là
A. thúc đẩy các ngành kinh tế khác cùng phát triển.
B. sử dụng các loại tài nguyên thiên nhiên với quy mô lớn.
C. mang lại hiệu quả cao, chiếm tỉ trọng lớn trong giá trị sản xuất công nghiệp.
D. có thế mạnh lâu dài cả về tự nhiên và kinh tế xã hội. Đáp án là: B. sử dụng các loại tài nguyên thiên nhiên với quy mô lớn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một nguồn O trên mặt nước dao động điều hòa theo phương thẳng đứng với phương trình u 0 = 5 cos 8 π t - 2 π 3 cm. Tốc độ truyền sóng trên mặt nước là 4 m/s, coi biên độ sóng không đổi trong quá trình truyền sóng. Phương trình dao động tại điểm M cách nguồn O một đoạn 25 cm theo chiều dương là
A. u M = 5 cos 8 π t - 7 π 6 cm.
B. u M = 5 cos 8 π t - 5 π 6 cm
C. u M = 5 cos 8 π t - 2 π 3 cm
D. u M = 5 cos 8 π t - π 2 cm Đáp án là: A. u M = 5 cos 8 π t - 7 π 6 cm. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nước Gia-ven là dung dịch trong nước của
A. NaClO
B. NaCl
C. NaClO và NaOH
D. NaClO và NaCl Đáp án là: D. NaClO và NaCl </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: “Would you like to go on a picnic with me?” Student B: “______________”
A. I’d love to.
B. It’s alright.
C. Yes, I would.
D. Yes, a lot. Đáp án là: A. I’d love to. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trên một sợi dây đàn hồi AB đang có sóng dừng với hai đầu dây cố định, tần số thay đổi được, chiều dài dây không đổi, coi tốc độ truyền sóng luôn không đổi. Khi tần số bằng f thì trên dây có ba bụng sóng. Tăng tần số thêm 20Hz thì trên dây có năm bụng sóng. Để trên dây có sáu bụng sóng thì cần tiếp tục tăng tần số thêm
A. 10Hz
B. 50Hz
C. 60Hz
D. 30Hz Đáp án là: A. 10Hz </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. crowd ed
B. adopt ed
C. appall ed
D. advocat ed Đáp án là: C. appall ed </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo gồm lò xo có độ cứng 20 N/m và vật nhỏ có khối lượng 0,2 kg dao động điều hòa trên phương ngang với biên độ 8 cm. Tìm chu kỳ dao động của con lắc, tốc độ của vật khi nó qua vị trí cân bằng và tốc độ của vật khi nó qua vị trí cách vị trí cân bằng 6 cm.
A. T = 0,2π (s); v(0) = 80cm/s; v(6) = 52,9cm/s
B. T = 0,2π (s); v(0) = 40cm/s; v(6) = 33,9cm/s
C. T = 0,1π (s); v(0) = 30cm/s; v(6) = 52,9cm/s
D. T = 0,1π (s); v(0) = 80cm/s; v(6) = 52,9cm/s Đáp án là: A. T = 0,2π (s); v(0) = 80cm/s; v(6) = 52,9cm/s </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong cơ chế điều hòa hoạt động của opêrôn Lac của vi khuẩn E.coli, giả sử gen Z nhân đôi 1 lần và phiên mã 20 lần. Theo lí thuyết, phát biểu nào sau đây đúng?
A. Môi trường sống không có lactôzơ
B. Gen A phiên mã 10 lần
C. Gen điều hòa nhân đôi 2 lần
D. Gen Y phiên mã 20 lần Đáp án là: D. Gen Y phiên mã 20 lần </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... |
<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là đúng?
A. Amilozơ có cấu trúc mạch không phân nhánh
B. Glucozơ bị oxi hóa bởi H 2 (Ni, t o ).
C. Xenlulozơ có cấu trúc mạch phân nhánh.
D. Saccarozơ không bị thủy phân. Đáp án là: A. Amilozơ có cấu trúc mạch không phân nhánh </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đối tượng nào sau đây được biểu hiện bằng phương pháp kí hiệu?
A. Hải cảng.
B. Dòng biển.
C. Luồng di dân.
D. Hướng gió. Đáp án là: A. Hải cảng. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đồ thị hàm số nào sau đây có 3 điểm cực trị?
A. y=x^4+2x^2
B. y=x^4−2x^2−1
C. y=2x^4+4x^2−4
D. y=−x^4−2x^2−1 Đáp án là: B. y=x^4−2x^2−1 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Lựa chọn đáp án đúng nhất: Biết trung bình cộng của 4 số là 27,43. Vậy tổng của 4 số đó là:
A. 108,72
B. 109,72
C. 108,74
D. 109,74 Đáp án là: B. 109,72 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Giá trị của m để hàm số y=x^3+mx−1 có cực đại và cực tiểu là
A. m≥0.
B. m≤0.
C.m>0.
D. m<0. Đáp án là: D. m<0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tia tới song song với trục chính của thấu kính phân kỳ cho ta tia ló
A. đi qua tiêu điểm của thấu kính.
B. song song với trục chính của thấu kính.
C. cắt trục chính của thấu kính tại một điểm bất kì.
D. có đường kéo dài đi qua tiêu điểm của thấu kính. Đáp án là: D. có đường kéo dài đi qua tiêu điểm của thấu kính </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to indicate the word that differs from the other three in the position of stress in each of the following questions. (Chọn đáp án A, B, C hoặc D để tìm từ có trọng âm khác với ba từ còn lại)
A. bilingual
B. magnificent
C. inaccessible
D. promote Đáp án là: C. inaccessible </s> | [
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<s> Chọn đáp án đúng với câu hỏi: 79,4% (năm 2004) là tỉ trọng khu vực dịch vụ của nước nào sau đây
A. Nhật Bản
B. LB Nga
C. Trung Quốc
D. Xây dựng Đáp án là: D. Xây dựng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Which of the following is NOT true about the culture of the United States
A. It’s impolite to look the other person in the eyes while talking
B. It’s rude to look at the other person for a long time.
C. Pointing at someone is usually considered rude.
D. It’s all right to raise your hand slightly to attract the waiter’s attention. Đáp án là: B. It’s rude to look at the other person for a long time. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Protein có phản ứng màu biure với chất nào sau đây?
A. KOH.
B. Ca(OH) 2.
C. Cu(OH) 2.
D. NaOH. Đáp án là: C. Cu(OH) 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một hộp đựng 6 bi trắng và 5 bi xanh. Lấy ngẫu nhiên 4 viên bi từ hộp, hỏi có bao nhiêu cách lấy mà 4 viên bi lấy ra có đủ hai màu?
A. 300
B. 310
C. 320
D. 330 Đáp án là: B. 310 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho phản ứng: KI + H 2 SO 4 ⟶ I 2 + H 2 S + K 2 SO 4 + H 2 O Hệ số cân bằng của H 2 SO 4 là
A. 8
B. 5
C. 4
D. 3 Đáp án là: B. 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: What is the main topic of the passage?
A. The changing pollutants in the atmosphere.
B. The decreasing pollution of the atmosphere.
C. Hydroxyl’s influence on the atmosphere.
D. The oxygenation of the atmosphere. Đáp án là: A. The changing pollutants in the atmosphere. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khoanh vào chữ đặt trước câu trả lời đúng. Với lãi xuất tiết kiệm 0, 5% một tháng, cần gửi bao nhiêu tiền để sau 1 tháng nhận được số tiền lài 1 200 000 đồng.
A. 500 000 000 đ
B. 240 000 000 đ
C. 1 000 000 000 đ
D. 150 000 000 đ Đáp án là: B. 240 000 000 đ </s> | [
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1251,
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325,
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228,
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<s> Chọn đáp án đúng với câu hỏi: Legend has it that in the mid-15th century (18) __________,
A. festival
B. century
C. time
D. occasion Đáp án là: B. century </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mũi tên được bắn đi từ cái cung là nhờ năng lượng của mũi tên hay của cái cung? Đó là dạng năng lượng nào?
A. Nhờ năng lượng của cánh cung, dạng năng lượng đó là thế năng đàn hồi
B. Nhờ năng lượng của cánh cung, dạng năng lượng đó là thế năng hấp dẫn
C. Nhờ năng lượng của mũi tên, dạng năng lượng đó là thế năng đàn hồi
D. Nhờ năng lượng của mũi tên, dạng năng lượng đó là thế năng hấp dẫn Đáp án là: A. Nhờ năng lượng của cánh cung, dạng năng lượng đó là thế năng đàn hồi </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đông Nam Á có vị trí địa - chính trị rất quan trọng vì?
A. Khu vực này tập trung rất nhiều loại khoáng sản.
B. Là nơi đông dân nhất thế giới, tập trung nhiều thành phần dân tộc.
C. Nền kinh tế phát triển mạnh và đang trong quá trình công nghiệp hóa, hiện đại hóa.
D. Là nơi tiếp giáp giữa hai đại dương, vị trí cầu nối hai lục địa và là nơi các cường quốc thường cạnh tranh ảnh hưởng. Đáp án là: D. Là nơi tiếp giáp giữa hai đại dương, vị trí cầu nối hai lục địa và là nơi các cường quốc thường cạnh tranh ảnh hưởng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một vật dao động cưỡng bức dưới tác dụng của một ngoại lực biến thiên điều hòa với tần số f. Chu kỳ dao động của vật là:
A. f
B. 2 f
C. 1 f
D. 2f Đáp án là: C. 1 f </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong 1 phản ứng hoá học các chất phản ứng và sản phẩm chứa cùng:
A. Số nguyên tử của mỗi nguyên tố.
B. Số phân tử trong mỗi chất.
C. Số phân tử của mỗi chất.
D.Số nguyên tố tạo ra chất. Đáp án là: D.Số nguyên tố tạo ra chất </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhờ đâu mà Thánh Gióng biết nói?
A. Khi bọn giặc xâm lăng
B. Khi làng xóm đến chơi
C. Khi cha mẹ dạy cậu nói
D. Khi nghe tiếng rao của sứ giả Đáp án là: D. Khi nghe tiếng rao của sứ giả </s> | [
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<s> Chọn đáp án đúng với câu hỏi: In this course, students receive _______ in the basic English grammar.
A. instruct
B. instructional
C. instruction
D. instructive Đáp án là: A. instruct </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hôm nay là thứ năm. Hỏi 100 ngày sau là thứ mấy trong tuần?
A. Thứ tư
B. Thứ sáu
C. Thứ năm
D. Thứ bảy Đáp án là: D. Thứ bảy </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Không khí sẽ bị ô nhiễm khi tăng cao nồng độ của chất sau đây?
A. Khí N 2
B. Khí O 2
C. Khí CO 2
D. Hơi nước Đáp án là: C. Khí CO 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm tích hai số biết thừa số thứ nhất là 2 và thừa số thứ hai là số liền sau của thừa số thứ nhất.
A. 6
B. 7
C. 8
D. 9 Đáp án là: A. 6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có các phát biểu sau: 1. Khi cho axit glutamic tác dụng với NaOH dư thì tạo sản phẩm là bột ngọt. 2. Phân tử các α-amino axit chỉ có một nhóm NH 2 và một nhóm COOH. 3. Dung dịch của các amino axit đều có khả năng làm quỳ tím chuyển màu. 4. Các amino axit đều là chất rắn ở nhiệt độ thường. 5. Cho α-amino axit tác dụng với hỗn hợp NaNO 2 và HCl sinh ra khí N 2. Số phát biểu đúng là
A. 2
B. 4
C. 1
D. 3 Đáp án là: A. 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trước cách mạng nước Pháp tồn tại những đẳng cấp nào?
A. Quý tộc, Tư sản, Nông dân.
B. Quý tộc, Tư sản, Đẳng cấp thứ ba.
C.Tăng lữ, Quý tộc, Đẳng cấp thứ ba.
D. Tăng Lữ, Quý tộc, nông dân. Đáp án là: C.Tăng lữ, Quý tộc, Đẳng cấp thứ ba. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: If it had not rained last night, the roads in the city ______ so slippery now.
A. would not be
B. must not be
C. could not have been
D. would not have been Đáp án là: A. would not be </s> | [
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1833,
4646,
29892,
278,
25320,
297,... | [
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<s> Chọn đáp án đúng với câu hỏi: Hoạt động nào sau đâu không thuộc giai đoạn tạo ra nguyên liệu?
A. Lọc hóa dầu
B. Chế biến lâm sản
C. Khai thác khoáng sản
D. Chế biến lương thực - thực phẩm Đáp án là: C. Khai thác khoáng sản </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Sau khi gặp gỡ Thị Nở, Chí Phèo đã có sự thay đổi như thế nào?
A. Nhận thức được thế giới xung quanh
B. Nhận thức về bản thân mình rõ hơn
C. Hồi tưởng về quá khứ và hi vọng về tương lai
D. Tất cả các đáp án trên Đáp án là: D. Tất cả các đáp án trên </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp khí nhẹ hơn không khí là
A. H 2 và CO 2
B. H 2 và N 2
C. H 2 và SO 2
D. H 2 và Cl 2 Đáp án là: B. H 2 và N 2 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Điều nào sau đây là không đúng? Cảm ứng từ tại mỗi điểm trong từ trường
A. Tiếp tuyến với đường sức từ tại điểm đó
B. Cùng hướng với hướng của từ trường tại điểm đó
C. Đặc trưng cho khả năng tác dụng lực từ tại điểm đó là mạnh hay yếu
D. Có phương vuông góc với trục của kim nam châm thử nằm cân bằng tại điểm đó Đáp án là: D. Có phương vuông góc với trục của kim nam châm thử nằm cân bằng tại điểm đó </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đại diện tiêu biểu cho xu hướng cải cách, canh tân đất nước bằng con đường ôn hòa trong phong trào yêu nước ở Việt Nam đầu thế kỉ XX là
A. Phan Bội Châu.
B. Hoàng Hoa Thám.
C. Tôn Thất Thuyết.
D. Phan Châu Trinh. Đáp án là: D. Phan Châu Trinh </s> | [
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3... | [
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<s> Chọn đáp án đúng với câu hỏi: If you had taken my advice, you _____ your job.
A. will not have lost
B. would not lost
C. will not lose
D. would not have lost Đáp án là: D. would not have lost </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Silence _____ the theatre as the audience awaited the opening curtain with expectation and excitement.
A. fell in with
B. came between
C. hung over
D. dropped out of Đáp án là: C. hung over </s> | [
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5664,
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408,
278,
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287,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một loại phân supephotphat kép có chứa 55,9% muối canxi đihidrophotphat, còn lại gồm các chất không chứa photpho. Độ dinh dưỡng của loại phân này là
A. 33,92%
B. 39,76%
C. 42,25%
D. 45,75% Đáp án là: A. 33,92% </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho sơ đồ phản ứng sau: Hai chất X và Y có thể có CTPT lần lượt là:
A. C 2 H 4, CH 4.
B. CaC 2, CH 4.
C. CH 4, C 2 H 4.
D. CaC 2, C 2 H 3 Cl. Đáp án là: C. CH 4, C 2 H 4. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu là cơ quan ngôn luận của Đông Dương Cộng sản đảng?
A. Báo Thanh niên
B. Báo Đỏ
C. Báo Búa liềm
D. Báo Giải phóng Đáp án là: C. Báo Búa liềm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi đổ 300 c m 3 giấm ăn vào 300 c m 3 nước thì thu được bao nhiêu c m 3 hỗn hợp?
A. 600 c m 3
B. 550 c m 3
C. Thể tích lớn hơn 600 c m 3
D. Thể tích nhỏ hơn 600 c m 3 Đáp án là: D. Thể tích nhỏ hơn 600 c m 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm 2 ancol đơn chức no Y và Z, trong đó có 1 ancol bậc 2. Đun hỗn hợp X với H 2 SO 4 đặc, 140°C thu được hỗn hợp ete T. Biết rằng trong T có 1 ete là đồng phân với 1 ancol trong X. Y và Z là
A. metanol, propan-2-ol.
B. metanol, etanol.
C. etanol, butan-2-ol.
D. propan-2-ol, etanol Đáp án là: C. etanol, butan-2-ol. </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong chiến dịch Hồ Chí Minh (1975), địa bàn tác chiến của các lực lượng vũ trang nhân dân Việt Nam là
A. rừng núi
B. đô thị
C. nông thôn
D. trung du Đáp án là: B. đô thị </s> | [
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Which of the following best serves as the title for the passage?
A. Cambridge University in an Attempt to Improve Students’ handwr
B. Cambridge University Pondering Changes to its Exam Practices
C. Cambridge University Attacked again for Abolishing Written Exams
D. Cambridge University to Replace Written with Oral Exams Đáp án là: B. Cambridge University Pondering Changes to its Exam Practices </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Động năng ban đầu cực đại của quang electron tách khỏi kim loại khi chiếu sáng thích hợp không phụ thuộc vào:
A. Tần số của ánh sáng kích thích.
B. Bước sóng của ánh sáng kích thích.
C. Bản chất kim loại dùng làm catot.
D. Cường độ của chùm sáng kích thích. Đáp án là: D. Cường độ của chùm sáng kích thích </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi bầu trời xung quanh ta có dông, ta thường nghe thấy tiếng sấm. Nguồn âm phát ra là:
A. các lớp không khí va chạm nhau.
B. do nhiều hơi nước trong không khí va chạm nhau.
C. lớp không khí ở đó dao động mạnh.
D. lớp không khí ở đó bị nén mạnh. Đáp án là: C. lớp không khí ở đó dao động mạnh. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 17, cho biết vùng Bắc Trung Bộ có bao nhiêu khu kinh tế cửa khẩu?
A. 2.
B. 3.
C. 4.
D. 1. Đáp án là: B. 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vật nào sau đây không có động năng?
A. quyển sách nằm yên
B. hòn bi lăn trên mặt sàn
C. máy bay đang bay
D. ô tô đang đi trên đường Đáp án là: A. quyển sách nằm yên </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tam giác vuông cân ABC vuông tại C,có cạnh huyền A B = R. Tại ba đỉnh A, B và C của tam giác, người ta đặt 3 chất điểm có khối lượng lần lượt là m, 2m và 3m. Tìm lực hấp dẫn tác dụng lên chất điểm tại C.
A. 3 5 G m 2 R 2
B. 6 5 G m 2 R 2
C. 12 G m 2 R 2
D. 5 5 G m 2 R 2 Đáp án là: B. 6 5 G m 2 R 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tam giác ABC, có đường phân giác BD và CE cắt nhau tại M. Biết rằng góc BMC có số đo là 140°. Số đo góc A của tam giác ABC là:
A. 120°
B. 80°
C. 130°
D. 100° Đáp án là: D. 100° </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Polime X được sinh ra trong quá trình quang hợp của cây xanh. Ở nhiệt độ thường, X tạo với dung dịch iot hợp chất màu xanh tím. Polime X là
A. xenlulozơ
B. glicogen
C. saccarozơ
D. tinh bột Đáp án là: D. tinh bột </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp M gồm ba peptit mạch hở X, Y, T có tỷ lệ mol tương ứng 2:3:4. Thủy phân hoàn toàn 35,97 gam M thu được hỗn hợp sản phẩm gồm 0,29 mol A và 0,18 mol B (A, B đều là các amino axit đã học có công thức dạng H 2 NC n H 2n COOH). Biết tổng số liên kết peptit trong ba phân tử X, Y, T là 16. Nếu đốt cháy 4x mol X hoặc 3x mol Y đều thu được số mol CO 2 như nhau. Đốt cháy hoàn toàn m gam hỗn hợp M thu được N 2, 0,74 mol CO 2 và a mol H 2 O. Giá trị của a gần nhất với giá trị nào sau đây?
A. 0,7.
B. 0,8.
C. 0,5.
D. 0,6. Đáp án là: A. 0,7. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sai khi nói về sóng điện từ?
A. Sóng điện từ dùng trong thông tin vô tuyến gọi là sóng vô tuyến.
B. Tại mỗi điểm nơi có sóng điện từ truyền qua, điện trường và từ trường biến thiên cùng chu kì.
C. Tại mỗi điểm nơi có sóng điện từ truyền qua, điện trường và từ trường dao động vuông pha.
D. Sóng điện từ là sự lan truyền trong không gian của điện từ trường biến thiên theo thời gian. Đáp án là: C. Tại mỗi điểm nơi có sóng điện từ truyền qua, điện trường và từ trường dao động vuông pha. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 5 lít dung dịch HNO 3 68% (D = 1,4 g/ml) phản ứng với xenlulozo (dư) thu được m kg thuốc súng không khói (xenlulozo trinitrat), biết hiệu suất phản ứng đạt 90%. Giá trị m gần nhất là
A. 8,5
B. 7,5
C. 6,5
D. 9,5 Đáp án là: C. 6,5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: If we are all too busy (3) ____ someone who is in emotional need, it can leave the person wondering what’s the real point of everything.
A. to notice
B. notice
C. noticing
D. noticed Đáp án là: A. to notice </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phép lai giữa hai cá thể A và B, trong đó A làm bố thì B làm mẹ và ngược lại gọi là
A. lai luân phiên
B. lai thuận nghịch
C. lai khác dòng kép.
D. lai phân tích. Đáp án là: B. lai thuận nghịch </s> | [
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1,
1,
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1,
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1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Mô hình định hướng của tăng trưởng xanh là
A. thúc đẩy sự phát triển cac-bon ở mức trung bình và tiến bộ xã hội.
B. tăng trưởng tập trung vào phát triển kinh tế mới, nguồn tài nguyên.
C. đảm bảo nguồn vốn tự nhiên tiếp tục cung cấp cho các thế hệ sau.
D. tăng cường sử dụng năng lượng tái tạo, vật liệu mới và hóa thạch. Đáp án là: C. đảm bảo nguồn vốn tự nhiên tiếp tục cung cấp cho các thế hệ sau. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Your sister has lost an awful lot of weight. She must have been on a diet,_________?
A. mustn’t she
B. needn’t she
C. haven’t she
D. hasn’t she Đáp án là: D. hasn’t she </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu đúng:
A. 0,5 A < 100 mA < 900 μ A < 0,9 A
B. 0,03A < 100 mA < 0,05 A< 0,9 A
C. 10 mA < 50 μA < 90 m A < 0,9 A
D. 0,1 A < 200 mA < 0,3 A < 0,5 A Đáp án là: D. 0,1 A < 200 mA < 0,3 A < 0,5 A </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I think ________ young need to be encouraged and supported in society.
A. a
B. an
C. the
D. Ø Đáp án là: C. the </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hấp thụ hoàn toàn 5,6 lít khí CO 2 (ở đktc) vào dung dịch NaOH dư, thu được dung dịch X. Khối lượng muối tan có trong dung dịch X là
A. 26,5 gam.
B. 21,2 gam.
C. 31,8 gam.
D. 15,9 gam. Đáp án là: A. 26,5 gam. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hình tròn nhỏ có bán kính bằng 1/4 bán kính hình tròn lớn. Hỏi chu vi hình tròn lớn gấp bao nhiêu lần chu vi tròn nhỏ?
A. 2 lần
B. 4 lần
C. 8 lần
D. 16 lần Đáp án là: B. 4 lần </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lực Lo-ren là lực do từ trường tác dụng lên
A. Nam châm.
B. Dòng điện.
C. Hạt điện tích chuyển động.
D. Dây dẫn. Đáp án là: C. Hạt điện tích chuyển động. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The most complicated motorway interchange in Britain is known as Spaghetti Junction.
A. complex
B. mingle
C. simple
D. related Đáp án là: C. simple </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thuỷ phân hoàn 0,15 mol este X của 1 axit đa chức và 1 ancol đơn chức cần 100 ml dung dịch NaOH 10% (d = 1,2 g/ml) thu được ancol Y và 22,2 gam muối. Lấy hết Y tác dụng với CuO dư, sản phẩm sinh ra cho tác dụng với dung dịch AgNO 3 /NH 3 dư thì thu được 129,6 gam kết tủa. Vậy X là
A. (COOCH 3 ) 2.
B. (COOC 2 H 5 ) 2.
C. CH 2 (COOCH 3 ) 2.
D. CH 2 (COOC 2 H 5 ) 2. Đáp án là: C. CH 2 (COOCH 3 ) 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Which of the following adjectives can be used to describe the backstage area?
A. messy
B. glamorous
C. relaxing
D. old Đáp án là: A. messy </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các tính chất sau, tính chất nào không phải của axit H 2 S O 4 đặc, nguội?
A. hòa tan kim loại Al, Fe
B. tan trong nước, tỏa nhiệt
C. làm hóa than vải, giấy, đường
D. háo nước Đáp án là: A. hòa tan kim loại Al, Fe </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The word “ surpassed ” is closest in meaning to _____.
A. imitated
B. exceeded
C. approached
D. included Đáp án là: B. exceeded </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hình tượng người lính được tác giả khắc họa qua những phương diện nào?
A.Hoàn cảnh xuất thân
B.Điều kiện sống có nhiều thiếu thốn, gian lao
C.Tình cảm đồng đội có nhiều thắm thiết, sâu sắc
D.Cả A, B, C đều đúng Đáp án là: D.Cả A, B, C đều đúng </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm amino axit Y (no, mạch hở, chứa 1 nhóm N H 2 và 1 nhóm COOH) và este Z no, đơn chức, mạch hở. Đốt cháy hoàn toàn 0,03 mol X thu được N 2 ; 0,07 mol C O 2 và 0,08 mol H 2 O. Mặt khác, 0,03 mol X trên phản ứng vừa đủ với dung dịch NaOH sinh ra m gam muối. Biết este Z không tráng bạc, giá trị của m là
A. 2,62.
B. 2,76.
C. 1,26.
D. 1,94. Đáp án là: C. 1,26. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
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865,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Ở độ cao từ 600 – 700m đến 1.600 – 1.700m có
A. đất mùn.
B. đất feralit có mùn.
C. nhiều loài cây ôn đới.
D. chim di cư từ khu hệ Himalaya. Đáp án là: B. đất feralit có mùn. </s> | [
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nguyên tố vi lượng không có đặc điểm nào sau đây?
A. Chiếm tỉ lệ nhỏ hơn 0,01 % khối lượng chất sống của cơ thể.
B. Chỉ cần cho động vật và thực vật ở giai đoạn sinh trưởng.
C. Là thành phần cấu tạo của hầu hết các enzyme và nhiều chất hữu cơ.
D. Là nguyên tố không thể thiếu đối với tế bào và cơ thể sinh vật. Đáp án là: B. Chỉ cần cho động vật và thực vật ở giai đoạn sinh trưởng. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Choose the best answer to complete the passage My favourite meal is breakfast. From Monday (21) _______ Friday I go to school early so I have a quick breakfast. I usually (22) ______ cereal with milk or sometimes I have toast and jam, but the weekend is different! On Saturdays and Sundays, my dad (23) ______ an English breakfast for everyone in our family. A typical English breakfast is egg, bacon, sausages, tomatoes, mushrooms and baked beans (beans in tomato sauce). Then we have toast and jam. I (24) _______ orange juice and my mum and dad drink tea or coffee. I love breakfast on the weekend (25) _________ I have breakfast with my whole family.
A. to
B. at
C. between
D. of Đáp án là: A. to </s> | [
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852,
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1900,
1234,
304,
4866,
278,
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1619,
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56... | [
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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: Oxit nào sau đây có tính lưỡng tính
A. Fe 2 O 3
B. Cr 2 O 3
C. CuO
D. CrO Đáp án là: C. CuO </s> | [
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1,
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298... | [
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1,
1,
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Để điều chế 6 lít NH 3 từ N 2 và H 2 với hiệu suất 40% thì thể tích khí N 2 (lít) cần dùng ở cùng điều kiện là bao nhiêu?
A. 7,5.
B. 15,0.
C. 16,5.
D. 24,0. Đáp án là: A. 7,5. </s> | [
1,
1,
29871,
678,
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29876,
29871,
30128,
29976,
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29871,
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29871,
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30030,
865,
325,
31280,
29875,
274,
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347,
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30712... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: The workshop on sex education _______ we attended last week was very informative.
A. which
B. where
C. who
D. whose Đáp án là: A. which </s> | [
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450,
664,
19032,
373,
7916,
9793,
903,
7652,
1649,
591,
14283,
1833... | [
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1,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Khi cho H 2 NCH 2 -COOCH 3 tác dụng với dung dịch NaOH thu được sản phẩm hữu cơ X. chất X là:
A. Ancol etylic
B. Etylamin
C. Ancol metylic
D. Metylamin Đáp án là: C. Ancol metylic </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 19, cho biết tỉnh nào sau đây có diện tích trồng lúa so với diện tích trồng cây lương thực nhỏ hơn cả?
A. Long An.
B. Cà Mau.
C. Bình Định.
D. Nghệ An. Đáp án là: D. Nghệ An </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm x biết x⋮7,21≤x<28
A. x∈(21)
B. x∈(21;28)
C. x∈(28)
D. Đáp án khác. Đáp án là: A. x∈(21) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Độ ẩm không khí càng thấp thì sự thoát hơi nước?
A. không thay đổi
B. càng yếu
C. ngừng hẳn
D. càng mạnh Đáp án là: D. càng mạnh </s> | [
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm từ đồng nghĩa: Acupuncture originated in China and has been used as a traditional medicine for thousands of years.
A. began
B. created
C. developed
D. introduced Đáp án là: A. began </s> | [
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1,
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29871,
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29976,
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29871,
1715,
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<s> Chọn đáp án đúng với câu hỏi: Cho các dữ liệu được thu thập trong các trường hợp sau:
(a) Để khảo sát chất lượng học tập môn Toán của học sinh khối 6, thầy hiệu trưởng đã cho toàn bộ học sinh lớp 6A làm bài kiểm tra trong 45 phút và ghi lại kết quả.
(b) Giáo viên chủ nhiệm đã hỏi toàn bộ học sinh trong lớp về loại phương tiện mà các bạn thường sử dụng để đến trường và kết luận rằng: “Xe đạp là loại phương tiện các bạn trong lớp sử dụng nhiều nhất”.
(c) Bí thư lớp 7B muốn chọn ngẫu nhiên 15 bạn trong lớp tham gia thi văn nghệ nhân ngày Nhà giáo Việt Nam 20/11, do đó bạn Bí thư đã chọn các bạn có số thứ tự trong danh sách là số chẵn từ bạn có số thứ tự 2 cho đến bạn có số thứ tự 30 để đủ 15 bạn tham gia thi văn nghệ.
Trong các cách thu thập dữ liệu trên, cách thu thập dữ liệu nào đảm bảo được tính đại diện?
A. (a) và (b);
B. (a) và (c);
C. (b) và (c);
D. (a), (b) và (c). Đáp án là: C. (b) và (c); </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... |
<s> Chọn đáp án đúng với câu hỏi: Hai lò xo được nối nhau cố định. Kéo 2 đầu bằng lực F thì lò xo thứ nhất có k 1 = 100 N / m bị dãn ra 3cm; lò xo thứ hai có k 2 = 150 N / m thì bị dãn ra bao nhiêu:
A. 2 cm
B. 3 cm
C. 1,5 cm
D. 1 cm Đáp án là: A. 2 cm </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
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29976,
29886,
29871,
1715,
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865,
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274,
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29875,
29901,
379,
1794,
658,
30712,
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29877,
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30128,
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207,
158,
2... | [
1,
1,
1,
1,
1,
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,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Khi nói về thấu kính phân kì, câu phát biểu nào sau đây là sai?
A. Thấu kính phân kì có phần rìa dày hơn phần giữa.
B. Tia tới song song với trục chính thì tia ló kéo dài đi qua tiêu điểm của thấu kính.
C. Tia tới đến quang tâm của thấu kính tiếp tục truyền thẳng theo hướng của tia tới.
D. Tia tới song song với trục chính thì tia ló đi qua tiêu điểm của thấu kính. Đáp án là: C. Tia tới đến quang tâm của thấu kính tiếp tục truyền thẳng theo hướng của tia tới. </s> | [
1,
1,
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29901,
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2918,
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2453,
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30712,
266,
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31500,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Chiếu một tia sáng đơn sắc đi từ không khí vào môi trường có chiết suất n với góc tới i. Tia phản xạ vuông góc với tia khúc xạ. Hệ thức nào sau đây là đúng?
A. sini = n
B. sini = 1/n
C. tani = n
D. tani = 1/n Đáp án là: C. tani = n </s> | [
1,
1,
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678,
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29871,
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29976,
29886,
29871,
1715,
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865,
325,
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274,
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29875,
29901,
678,
347,
31500,
30103,
29884,
2730,
31214,
31500,
29873,
260,
423,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Trong tác phẩm Lặng lẽ Sa Pa của Nguyễn Thành Long được kể lại dưới điểm nhìn của ai?
A. Anh thanh niên
B. Cô kĩ sữ
C. Ông họa sĩ già
D. Tác giả Đáp án là: C. Ông họa sĩ già </s> | [
1,
1,
29871,
678,
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29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
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30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
1605,
549,
11062,
30103,
29883,
1374,
29874,
31500,
207,
140,
29885,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Due to unforeseen circumstances, our group’s scheduled visit to the museum has been called off.
A. The trip to the museum that we’d planned is now cancelled because something unexpected has happened.
B. Something happened at the museum, so they cancelled our visit.
C. We are no longer going to the museum because there is no time our schedule.
D. We can’t go to see the museum at the arranged time because it will be closed. Đáp án là: A. The trip to the museum that we’d planned is now cancelled because something unexpected has happened. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
16809,
304,
443,
1454,
968,
264,
14209,
29892,
1749,
2318,
30010,
2... | [
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,
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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,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The bathroom is down stairs... (14)... the kitchen and there is a living room where there is a lovely old fire place.
A. between
B. next
C. near to
D. next to Đáp án là: D. next to </s> | [
1,
1,
29871,
678,
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29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
450,
27683,
8345,
338,
1623,
380,
7121,
856,
313,
29896,
29946,
467... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Quốc gia nào có diện tích lớn nhất khu vực Đông Nam Á?
A. In-đô-nê-xi-a
B. Mi-an-ma.
C. Thái Lan.
D. Việt Nam. Đáp án là: A. In-đô-nê-xi-a </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
751,
29877,
31500,
30103,
29883,
330,
423,
1055,
30712,
29877,
1302,
... | [
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,
1,
1,
1,
1,
1,
1,
1,
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: Tìm giá trị của x thỏa mãn: 13^1:x = 13.
A. x = 1;
B. x = 2;
C. x = 3;
D. x = 0. Đáp án là: A. x = 1; </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
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30030,
865,
325,
31280,
29875,
274,
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29884,
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228,
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29875,
29901,
323,
30097,
29885,
4005,
29976,
534,
30740,
274,
31556,
29874,
921,
... | [
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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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