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<s> Chọn đáp án đúng với câu hỏi: Carbon dioxide ________ as one of the main contributors to the green house effect.
A. has been identified
B. has identified
C. had been identified
D. had identified Đáp án là: A. has been identified </s> | [
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408,
697,
310,
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<s> Chọn đáp án đúng với câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Mr. Brown and some volunteer conservationists are on a very dirty beach now. Today they are ready ( 25 )___________ the b... | [
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350,
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<s> Chọn đáp án đúng với câu hỏi: Hoà tan 124 gam Na 2 O vào 876 ml nước, phản ứng tạo ra NaOH. Nồng độ phần trăm của dung dịch thu được là
A. 16%.
B. 17%.
C. 18%.
D. 19%. Đáp án là: A. 16%. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: You don’t expect me _________ that you actually met John,do you?
A. believe
B. believed
C. to believe
D. believing Đáp án là: C. to believe </s> | [
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<s> Chọn đáp án đúng với câu hỏi: If any employee knowingly breaks the terms of this contract, he will be dismissed immediately.
A. coincidentally
B. deliberately
C. instinctively
D. accidentally Đáp án là: D. accidentally </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cây trồng chính chiếm một nửa đất canh tác của Nhật Bản là:
A. dâu tằm.
B. lúa gạo
C. thuốc lá
D. chè Đáp án là: B. lúa gạo </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word whose stress pattern is different from the other three in the following question
A. accur a te
B. t a le
C. sh a pe
D. d a te Đáp án là: A. accur a te </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có 3 bút xanh, 5 bút đỏb. Tỉ số của bút đỏ và bút xanh là
A. 3/8
B. 3/5
C. 5/3
D. 5/8 Đáp án là: C. 5/3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong mặt phẳng tọa độ Oxy, đường tròn x^2 + y^2 – 10y – 24 = 0 có bán kính bằng bao nhiêu?
A. 49;
B. 7;
C. 1;
D. √(29). Đáp án là: B. 7; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kim loại nhôm không phản ứng được với dung dịch nào sau đây?
A. H 2 SO 4 đặc, nóng.
B. HNO 3 loãng.
C. HNO 3 đặc, nguội.
D. H 2 SO 4 loãng. Đáp án là: C. HNO 3 đặc, nguội. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có bao nhiêu giá trị x thỏa mãn tỉ lệ thức 36/(x) = (x)/9.
A. 1
B. 2
C. 0
D. 3 Đáp án là: B. 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngành công nghiệp năng lượng nào sau đây phát triển mạnh nhất ở vùng Tây Nguyên?
A. Nhiệt điện.
B. Khai thác than.
C. Hoá dầu.
D. Thuỷ điện. Đáp án là: D. Thuỷ điện </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Để nhận biết ion Ba 2+, người ta dùng dung dịch
A. NaBr.
B. Na 2 SO 4.
C. NaCl.
D. NaNO 3. Đáp án là: B. Na 2 SO 4. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tiến hành nuôi hạt phấn của cây có kiểu gen AaBbDd để tạo dòng thuần chủng. Theo lí thuyết, có thể thu được tối đa bao nhiêu dòng thuần?
A. 2.
B. 8.
C. 4.
D. 16. Đáp án là: B. 8. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho sơ đồ sau: C 3 H 6 → C 3 H 7 Br → C 3 H 8 O → C 3 H 6 O (X). Biết các chất đều là sản phẩm chính. X có những tính chất là
A. phản ứng cộng với H 2.
B. phản ứng tráng bạc.
C. phản ứng với Cu(OH) 2 /OH - (t o ).
D. cả A, B, C. Đáp án là: A. pha... | [
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29875,
29901,
14542,
577,
207,
158,
29871,
30128,
29877,
31500,
30712,
12507,
29901... | [
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<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào đã diễn ra ở Đức vào ngày 9 - 11 - 1918?
A. Cách mạng bùng nổ, Hoàng đế Vinhem II bỏ chạy sang Hà Lan
B. Chính phủ mới được thành lập
C. Đức kí hiệp ước thừa nhận thất bại với Mĩ
D. Đức kí hiệp định đầu hàng khô... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các phát biểu sau : (1) Đột biến gen là nguyên liệu sơ cấp chủ yếu so với đột biến nhiễm sắc thể vì đột biến gen dễ xảy ra và ít ảnh hưởng đến sinh vật hơn. (2) Biến dị tổ hợp là nguồn nguyên liệu sơ cấp cho quá trì... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hòa tan hoàn toàn 11,2 gam bột Fe vào dung dịch HCl dư, thấy thoát ra V lít khí H 2 (đktc). Giá trị của V là
A. 2,24.
B. 4,48.
C. 8,96.
D. 6,72. Đáp án là: B. 4,48. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong một phản ứng phân hạch, gọi tổng khối lượng nghỉ của các hạt trước phản ứng là m t và tổng khối lượng nghỉ của các hạt sau phản ứng là m s. Hệ thức nào sau đây đúng?
A. m t < m s.
B. m t ≥ m s
C. m t > m s
D. m t ≤ m s. Đáp án là: ... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X chứa một oxit sắt; 0,1 mol Cr 2 O 3 và 0,4 mol Al. Thực hiện phản ứng nhiệt nhôm hỗn hợp X sau một thời gian thu được hỗn hợp chất rắn Y. Chia Y thành 2 phần bằng nhau. Phần 1 tác dụng với H 2 SO 4 đặc, nóng dư thu đượ... | [
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<s> Chọn đáp án đúng với câu hỏi: Hai người đi xe máy xuất phát đồng thời từ hai thành phố cách nhau 225 km. Họ đi ngược chiều và gặp nhau sau 3 giờ. Hỏi vận tốc của người thứ nhất, biết rằng vận tốc người thứ nhất lớn hơn người thứ hai 5 km/h
A. 40 km/h
B. 35 km/h
C. 45 km/h
D. 50 km/h Đáp án là: A. 40 km/h </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the correct answers A, B, C or D. We should eat less junk food and eat..... fruit and vegetables.
A. any
B. more
C. no
D. few Đáp án là: B. more </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhiệm vụ chủ yếu trước mắt của cách mạng Việt Nam trong Báo cáo chính trị do Chủ tịch Hồ Chí Minh trình bày tại Đại hội Đảng lần thứ II là gì?
A. Đánh đổ đế quốc phong kiến, làm cách mạng dân tộc dân chủ.
B. Đánh đổ thực dân ... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tam giác ABC. Có bao nhiêu vectơ được lập ra từ các cạnh của tam giác?
A. 3
B. 2
C. 4
D. 6 Đáp án là: D. 6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: If the local people ____ the necessary skills to participate in the eco-tourism industry or interact with foreign tourists, the government may provide job training and education.
A. lack
B. lack in
C. lack of
D. lack for Đáp án là: A. lack </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I___ born on the first of May.
A. were
B. was
C. are
D. is Đáp án là: B. was </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Oxit cao nhất của một nguyên tố là RO 3. Trong hợp chất của nó với hidro có 5,88% H về khối lượng. Nguyên tử khối của nguyên tố R là
A. 27.
B. 32.
C. 16.
D. 31. Đáp án là: B. 32. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biểu thức diễn tả đúng quá trình chất khí vừa truyền nhiệt vừa thực hiện công là:
A. ΔU=Q+A;Q>0;A<0
B. ΔU=Q;Q>0
C. ΔU=Q+A;Q<0;A<0
D. ΔU=Q+A;Q>0;A>0 Đáp án là: C. ΔU=Q+A;Q<0;A<0 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: I’d like some rice I’m.........
A. thirsty
B. thin
C. hungry
D. full Đáp án là: C. hungry </s> | [
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678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
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274,
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298,
228,
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146,
29875,
29901,
306,
30010,
29881,
763,
777,
19408,
306,
30010,
29885,
3045,
18598,
... | [
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<s> Chọn đáp án đúng với câu hỏi: She has been studying engineering________
A. since 5 years
B. for 5 years
C. 5 years before
D. during 5 years. Đáp án là: B. for 5 years </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A. element B. dedicate C. event D. devote
A. element
B. dedicate
C. event
D. devote Đáp án là: D. devoteA </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp số sai:
A. 1,5A = 1500mA
B. 0,15A = 150mA
C. 125mA = 0,125A
D. 1250mA = 12,5A Đáp án là: D. 1250mA = 12,5A </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một vật thực hiện đồng thời hai dao động điều hòa cùng phương cùng tần số, lệch pha nhau là π / 3. Phương trình hai dao động lần lượt là x 1 = A 1 cos 4 πt + φ 1 (cm) và x 1 = 10 cos 4 πt + φ 2 (cm). Khi li độ của dao động thứ nhất là 3... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: She was tired. She____ for a long time.
A. has been learning
B. had been learning
C. leaned
D. was learning Đáp án là: B. had been learning </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các đoạn thẳng AB=8cm ;CD = 6cm ; MN = 12mm. PQ = x. Tìm x để AB và CD tỉ lệ với MN;PQ
A. x = 9 cm
B. x = 0,9cm
C. x = 18 cm
D. Cả ba đều sai Đáp án là: B. x = 0,9cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Earning money has always been the thing that pleases him most. ________ he becomes, ________ he is.
A. The poorer / the more happily
B. The richer / the more happily
C. The richer / the happier
D. The poorer / the happier Đáp án là: C. The richer / the happier </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ở một loài thực vật, thể tứ bội tạo giao tử 2n có khả năng sống. Tỉ lệ kiểu gen ở thế hệ lai khi cho Aaaa tự thụ phấn là
A. 1 AAaa : 4 Aaaa : 1 aaaa
B. 1 AAAA : 8 AAAa : 18 AAaa : 8 Aaaa : 1 aaaa
C. 1 AAAA : 5 Aaaa : 5 Aaaa : laaaa
D. 1 AAaa : 2 ... | [
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<s> Chọn đáp án đúng với câu hỏi: "If you pass your test, I'll buy you a car", he said.
A. He said that If I pass my test, he'll buy me a car.
B. He said that If you pass your test, he would buy you a car.
C. He said that If I pass my test, he would buy me a car.
D. He said that If I had pass my test, he would have bou... | [
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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. m ee t
B. f ee d
C. sp ee d
D. f i t Đáp án là: D. f i t </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tại một điểm trên mặt chất lỏng có một nguồn dao động với tần số 120Hz, tạo ra sóng ổn định trên mặt chất lỏng. Xét 5 gợn lồi liên tiếp trên một phương truyền sóng ở về một phía so với nguồn, gợn thứ nhất cách gợn t... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong xináp, chất trung gian hóa học nằm ở?
A. Màng trước xináp
B. Chùy xináp
C. Màng sau xináp
D. Khe xináp Đáp án là: B. Chùy xináp </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Để khử mùi tanh của cá (gây ra do một số amin), ta có thể rửa cá với
A. nước.
B. giấm.
C. este.
D. nước muối. Đáp án là: B. giấm. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Al tác dụng với dung dịch HNO 3 theo các sơ đồ phản ứng sau: A l + H N O 3 → A l ( N O 3 ) 3 + N O ↑ + H 2 O A l + H N O 3 → A l ( N O 3 ) 3 + N 2 O ↑ + H 2 O Cho m gam Al tác dụng vừa đủ với dung dịch HNO 3 tạo ra hỗn hợp khí A gồm 0,15mol NO và 0,05mol N ... | [
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30103,
29... | [
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<s> Chọn đáp án đúng với câu hỏi: According to the passage, what do most nutritionists suggest?
A. Sufficient carbohydrates will prevent gluconeogenesis.
B. Carbohydrates are simple sugars called glucose.
C. Carbohydrates should make up about a quarter of a person’s daily diet.
D. Carbohydrates should be eaten in very ... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho hàm số: y=(x^2-2x)/(x+1) (C)
Đạo hàm của hàm số đã cho tại x=1 là:
A. 1/4
B. (-1)/2
C. 0
D. 1/2 Đáp án là: A. 1/4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho biểu đồ sau: TỐC ĐỘ TĂNG TRƯỞNG GIÁ TRỊ SẢN XUẤT CÔNG NGHIỆP CỦA NƯỚC TA TRONG GIAI ĐOẠN 2009 – 2012 Có bao nhiêu nhận xét sau đây đúng về tốc độ tăng trưởng giá trị sản xuất công nghiệp của nước ta giai đoạn 2009 – 2012? 1) Gi... | [
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289,
347,
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207,
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31500,
... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: After he _____ his work, he went straight home.
A. would finish
B. has finished
C. had finished
D. has been finishing Đáp án là: C. had finished </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về vai trò của cách li địa lí trong quá trình hình thành loài mới, có bao nhiêu phát biểu sau đây là không đúng? (1) Cách li địa lí là những trờ ngại về mặt địa lí như sông, núi, biển.... ngăn cản các cá thể của quần thể cu... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một sợi dây đàn hồi AB hai đầu cố định được kích thích dao động với tần số 20Hz thì trên dây có sóng dừng ổn định với 3 nút sóng (không tính hai nút ở A và B). Để trên dây có sóng dừng với 2 bụng sóng thì tần số dao động ... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tom is getting ever keener on doing research on ______.
A. biology
B. biological
C. biologist
D. biologically Đáp án là: A. biology </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Giá trị của đơn thức A = -1/2 x^3y^2 tại x = 2, y = -1 là:
A. 4
B. -4
C. 2
D. -2 Đáp án là: A. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D the word that has different stress pattern from others.
A. lyrical
B. exception
C. national
D. seriously Đáp án là: B. exception </s> | [
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<s> Chọn đáp án đúng với câu hỏi: To make ends ______, Phil picked up a second job delivering pizzas.
A. watch
B. look
C. see
D. meet Đáp án là: D. meet </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kim dài đồng hồ chỉ số IX, kim ngắn chỉ số V. Hỏi đồng hồ cho biết mấy giờ
A. 5 giờ kém 15 phút
B. 5 giờ 9 phút
C. 5 giờ 45 phút
D. 5 giờ 15 phút‘ Đáp án là: A. 5 giờ kém 15 phút </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khoảng tứ phân vị ∆_Q là
A. Q_2 – Q_1;
B. Q_3 – Q_1;
C. Q_3 – Q_2;
D. (Q_1 + Q_3) : 2. Đáp án là: B. Q_3 – Q_1; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong 150 ml dung dịch có hòa tan 6,39 gam Na 2 SO 4. Nồng độ mol của dung dịch là
A. 0,2M.
B. 0,3M.
C. 0,4M.
D. 0,5M. Đáp án là: B. 0,3M. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đập tan cuộc hành quân của Mĩ mang tên “Lam Sơn 719“ (từ ngày 12/2 đến ngày 23/3/1971) có sự phối hợp của quân đội nước nào?
A. Quân đội Việt Nam với quân dân Lào
B. Quân đội Việt Nam với quân dân Campuchia
C. Quân đội Việt Nam vơ... | [
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<s> Chọn đáp án đúng với câu hỏi: Nguyên tắc bổ sung được thể hiện trong cơ chế phiên mã là:
A. G liên kết với X, X liên kết với G, A liên kết với T, G liên kết với X
B. A liên kết với U, T liên kết với A, G liên kết với X, X liên kết với G
C. A liên kết vớ... | [
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<s> Chọn đáp án đúng với câu hỏi: Than bùn phân bố nhiều ở
A. Duyên hải Nam Trung Bộ.
B. ven biển Quảng Ninh
C. Đồng bằng sông Hồng.
D. Đồng bằng sông Cửu Long. Đáp án là: D. Đồng bằng sông Cửu Long </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây đúng?
A. Este no, đơn chức, mạch hở có công thức phân tử C n H n O 2, với n > 2
B. Phản ứng thủy phân este trong môi trường axit là phản ứng thuận nghịch
C. Phản ứng thủy phân este trong môi trường bazơ là phản ứn... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hỗn hợp bột X gồm 3 kim loại: Fe, Cu, Ag. Để tách nhanh Ag ra khỏi X mà không làm thay đổi khối lượng có thể dùng hoá chất nào sau đây?
A. dung dịch AgNO 3.
B. dung dịch FeCl 3.
C. dung dịch HCl và khí O 2.
D. dung dịch H 2 SO 4 đặc. Đáp án l... | [
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<s> Chọn đáp án đúng với câu hỏi: Tổ chức liên kết kinh tế khu vực nào sau đây có số dân nhỏ nhất (năm 2005)?
A. Liên minh châu Âu (EU).
B. Hiệp ước tự do thương mại Bắc Mĩ (NAFTA).
C. Thị trường chung Nam Mĩ (MERCOSUR).
D. Hiệp hội các quốc gia Đông Nam Á (ASEAN). Đáp... | [
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<s> Chọn đáp án đúng với câu hỏi: Tại nơi có gia tốc trọng trường g, một con lắc đơn dao động điều hòa với biên độ góc α o. Biết khối lượng vật nhỏ của con lắc là m. Khi con lắc ở vị trí có li độ góc α thì lực căng dây là
A. T = 2 mg cosα − cosα 0
B. T = mg 3 cosα ... | [
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<s> Chọn đáp án đúng với câu hỏi: Một bệnh nhân điều trị bằng đồng vị phóng xạ, dùng tia γ để diệt tế bào bệnh. Thời gian chiếu xạ lần đầu là D t = 30 phút, cứ sau 1 tháng thì bệnh nhân phải tới bệnh viện khám bệnh và tiếp tục chiếu xạ. Biết đồng vị phón... | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về mối quan hệ giữa huyết áp, tổng tiết diện mạch máu và vận tốc máu, phát biểu nào sau đây là đúng?
A. Trong hệ thống động mạch, tổng tiết diện từ động mạch chủ đến tiểu động mạch tăng dần nên vận tốc máu giả... | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp khí X gồm H 2 và một anken có khả năng cộng HBr cho sản phẩm hữu cơ duy nhất. Tỉ khối của X so với H 2 bằng 9,1. Đun nóng X có xúc tác Ni, sau khi phản ứng xảy ra hoàn toàn, thu được hỗn hợp khí Y không làm mất màu nước b... | [
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<s> Chọn đáp án đúng với câu hỏi: “ Tôi thà làm dân một nước tự do còn hơn làm vua một nước nô lệ ” câu nói trên là của nhân vật nào?
A. Hàm Nghi
B. Bảo Đại
C. Duy Tân
D. Thành Thái Đáp án là: B. Bảo Đại </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiếu một bức xạ đơn sắc thích hợp vào catốt của tế bào quang điện. Tách một chùm hẹp các electron quang điện có vận tốc 10 6 (m/s) và cho đi vào điện trường đều của một tụ điện phẳng tại điểm O cách đều hai bản tụ và phươn... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong không gian với hệ tọa độ Oxyz cho điểm M(3,2,1). Mặt phẳng (P) đi qua M và cắt các trục tọa độ Ox,Oy,Oz lần lượt tại các điểm A,B,C không trùng với gốc tọa độ sao cho M là trực tâm tam giác ABC. Trong các mặt phẳng sau, mặt phẳng song song với mặt phẳng (P) là
A. 3x+2y+z−14=0.
B.... | [
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<s> Chọn đáp án đúng với câu hỏi: Một đoạn vùng mã hóa của gen cấu trúc không phân mảnh có 2700 liên kết hydro được dùng để tổng hợp phân tử mARN có tỉ lệ các loại ribonucleotit A:U:G:X=1:2:3:4. Chiều dài của đoạn gen cấu trúc đã được sử dụng để tổng hợp mARN nó... | [
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<s> Chọn đáp án đúng với câu hỏi: In two days, I....................... my results.
A.will know
B. would know
C. will be knowing
D. know Đáp án là: A.will know </s> | [
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306,
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13... | [
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: U238 phân rã thành Pb206 với chu kỳ bán rã 4,47.10 9 năm. Một khối đá chứa 93,94.10 -5 kg U238 và 4,27.10 -5 kg Pb. Giả sử khối đá lúc đầu hoàn toàn nguyên chất chỉ có U238. Tuổi của khối đá là:
A. 5,28.10 6 (năm)
B. 3,64.10 8 (năm)
C. 3,32.10 ... | [
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501,
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29941,
29947,
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31500,
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1153,
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266... | [
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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: X, Y là 2 axit cacboxylic đều mạch hở; Z là ancol no; T là este hai chức, mạch hở được tạo bởi X, Y, Z. Đun nóng 38,86 gam hỗn hợp E chứa X, Y, Z, T với 400 ml dung dịch NaOH 1M (vừa đủ), thu được ancol Z và hỗn hợp F gồm 2 muối có tỉ lệ ... | [
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4853,
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274,
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18... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho tổng M = 75 + 120 + x. Với giá trị nào của x dưới đây thì M⋮3?
A. 7
B. 5
C. 4
D. 12 Đáp án là: D. 12 </s> | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hai xe ô tô A và B có khối lượng m A = 2 m B, có đồ thị tọa độ - thời gian của hai xe như ở hình b ê n. Gọi W đ A, W đ B tương ứng là động năng của xe A và xe B. Kết luận đúng là
A. W đ A = 4 W đ B
B. W đ A = 18 W đ B
C. W đ A = 6 W đ B
D. W đ A... | [
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304,
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319,
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35... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Căn cứ theo phạm vi lãnh thổ các nguồn vốn, thị trường, khoa học và công nghệ, kinh nghiệm quản lí từ các nước khác ảnh hưởng tới sự phát triển kinh tế - xã hội của một nước, được gọi là
A. nguồn lực từ bên trong.
B. ngu... | [
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865,
325,
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274,
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298,
228,
190,
146,
29875,
29901,
9243,
207,
137,
29876,
2723,
207,
158,
30103,
278,
29877,
1374,
298... | [
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: Nếu a + b = m và ab = n thì
A. (x + a)(x + b) = x^2 + mx + n
B. (x + a)(x + b) = x^2 + nx + m
C. (x + a)(x + b) = x^2 – mx – n
D. (x + a)(x + b) = x^2 – mx + n Đáp án là: A. (x + a)(x + b) = x^2 + mx + n </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: In a restaurant, if we want to call the water, we can raise our hand and wave it slight to signal that we need assistance.
A. slight to signal
B. if we
C. assistance
D. wave it Đáp án là: A. slight to signal </s> | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Ở cà độc dược có 12 cặp NST tương đồng trong tế bào sinh dưỡng. Có nhiều nhất bao nhiêu trường hợp đột biến dạng thể một đơn?
A. 12
B. 24
C. 15
D. 13 Đáp án là: A. 12 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Xăng có thể hòa tan
A. Nước
B. Dầu ăn
C. Muối biển
D. Đường Đáp án là: B. Dầu ăn </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tài nguyên thiên nhiên bị suy thoái là do
A. chiến tranh, thiên tai.
B. khai thác quá mức.
C. phát triển nông nghiệp.
D. dân số đông và trẻ. Đáp án là: B. khai thác quá mức. </s> | [
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1,
1,
1,
1,
1,
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một người đi bộ trên một đường thẳng với vận tốc không đổi 2 m/s. Thời gian để người đó đi hết quãng đường 780 m là
A. 6min15s.
B. 7min30s.
C. 6min30s.
D. 7min15s. Đáp án là: C. 6min30s. </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: On the battle field.
A. lied the tanks
B. did the tanks lie
C. the tanks lay
D. lay the tanks Đáp án là: D. lay the tanks </s> | [
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Các vương hầu, quý tộc nhà Trần chiêu tập dân nghèo để làm gì?
A. Luyện tập quân sự, làm đường sá, khai thác mỏ.
B. Làm nghề thủ công, ươm tơ, dệt vải.
C. Khai hoang, lập điền trang.
D. Hầu hạ, phục dịch, làm tôi tớ. Đáp án là: ... | [
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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: Địa bàn cư trú của các dân tộc ít người không phải là khu vực
A. thượng nguồn các con sông lớn.
B. có tiềm năng về tài nguyên thiên nhiên.
C. đồng bằng châu thổ sông màu mỡ.
D. v ị trí quan trọng về an ninh quốc phòng. Đáp án là: ... | [
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2723,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Các câu sau thuộc hành động nói gì? Cảm ơn cụ, nhà cháu đã tỉnh táo như thường. Nhưng xem ý hãy còn lề bề lệt bệt chừng như vẫn mỏi mệt lắm.
A. Hỏi
B. Trình bày
C. Điều khiển
D. Hứa hẹn Đáp án là: B. Trình bày </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một nguồn âm điểm đặt tại O phát âm công suất không đổi, truyền đẳng hướng. Coi môi trường không hấp thụ âm. Một máy đo mức cường độ âm di chuyển từ A đến B trên đoạn thẳng AB (với OA = 3 m) với tốc độ không đổi bằng 1... | [
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302,
2543,
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31500,
30712,
29876,
263... | [
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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(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. The palace was badly damaged by fire, but was eventually restored to its original splendor.
A. renovated
B. refurbished
C. streng... | [
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298,
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29875,
29901,
4485,
278,
5497,
319,
29892,
350,
29892,
315,
29892,
470,
360,
373,... | [
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Địa hình bờ biển của châu Đại Dương có đặc điểm?
A. Ít bị chia cắt.
B. Bị cắt xẻ mạnh.
C. Có nhiều vũng vịnh.
D. Có nhiều bãi cát đẹp. Đáp án là: A. Ít bị chia cắt. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lấy 5,2 gam hỗn hợp FeS 2 và Cu 2 S tác dụng hoàn toàn với dung dịch HNO 3 thì thu được dung dịch chỉ chứa 2 muối nitrat và 12,208 lít hỗn hợp NO 2 và SO 2 (đktc). Xác định % về khối lượng của FeS 2 trong hỗn hợp ban đầu
A. 93,23%
B. 71,53... | [
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31... | [
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1,
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1,
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một thợ mộc 1 tuần làm được 15 sản phẩm. Hỏi để làm được 45 sản phẩm thì cần bao nhiêu ngày? Biết năng suất làm việc của người thợ đó không thay đổi.
Hướng dân giải
A. 3 ngày;
B. 12 ngày;
C. 15 ngày;
D. 21 ngày. Đáp án là: D. 21 ngày </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lưới thức ăn của một quần xã sinh vật trên cạn được mô tả như sau: Các loài cây là thức ăn của sâu đục thân, sâu hại quả, chim ăn hạt, côn trùng cánh cứng ăn vỏ cây và một số loài động vật ăn rễ cây. Chim sâu ăn côn trùng ... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chủ tịch Hồ Chí Minh kí Tạm ước 14-9-1946 với Chính phủ Pháp tại đâu?
A. Thành phố Đà Lạt.
B. Phôngtennơblô.
C. Pari.
D. Thủ đô Hà Nội. Đáp án là: C. Pari. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Quá trình đô thị hoá của nước ta 1954 - 1975 có đặc điểm nào sau đây?
A. Phát triển rất mạnh trên cả hai miền.
B. Hai miền phát triển theo hai xu hướng khác nhau.
C. Quá trình đô thị hoá bị chửng lại do chiến tranh.
D. Miền Bắc phát tr... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong các khẳng định sau khẳng định nào đúng?
A. cos2x = 2cosx
B. cos2x = sin^2x - cos^2x
C. cos2x = 2cos^2x - 1
D. cos2x = 2sin^2x - 1 Đáp án là: C. cos2x = 2cos^2x - 1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Developments in micro–technology– computers and telecommunication are bound to have a huge influence on various aspects of our lives.
A. rarely
B. somehow
C. uncertain
D. likely Đáp án là: C. uncertain </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dùng dung dịch nào sau đây để phân biệt nhôm và sắt?
A. HCl
B. Cu(NO 3 ) 2
C. NaCl
D. NaOH Đáp án là: D. NaOH </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biết 356a7 > 35679, giá trị của a bằng:
A. 0
B. 10
C. 7
D. 9 Đáp án là: D. 9 </s> | [
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1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Một thanh thép xây dựng có tiết diện thẳng 2 c m 2 và độ dài 6m. Một lực 8.10 4 N nén nó theo trụ C. Độ nén của thanh do tác dụng của lực này là bao nhiêu? Suất Iâng của thép là 2.10 11 P a
A. 6 mm
B. 0, 6 mm
C. 4 mm
D. 4cm Đáp án là: A. 6 mm <... | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
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4546,
31214,
31500,
29873,
1135,
29882,
278,
30103,
29886,
921,
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<s> Chọn đáp án đúng với câu hỏi: Ai là người được vinh danh là danh nhân văn hóa thế giới?
A. Nguyễn Trãi
B. Lê Thánh Tông
C. Ngô Sĩ Liên
D. Lương Thế Vinh Đáp án là: A. Nguyễn Trãi </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,
319,
29875,
425,
30712,
302,
2543,
207,
158,
29877,
207,
158,
30712... | [
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