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<s> Chọn đáp án đúng với câu hỏi: “ If only I hadn’t lent him all my money!” –“____________________”
A. Well, you did, so it’s no use crying over spilt milk.
B. All right. You will be OK.
C. Sorry, I have no idea.
D. I’m afraid you will have to do it. Đáp án là: A. Well, you did, so it’s no use crying over spilt milk. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi viết tổng kết về kinh nghiệm học các môn khoa học tự nhiên, ý nào sau đây không cần thiết?
A. Đặc thù của môn khoa học tự nhiên
B. Đặc thù của môn khoa học xã hội
C. Phương pháp học tập bộ môn
D. Những kinh nghiệm của bản thân để học tốt môn học Đáp án là: B. Đặc thù của môn khoa học xã hội </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Số 976 làm tròn đến hàng chục thì được số.....?
A. 1000
B. 980
C. 950
D. 900 Đáp án là: B. 980 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt z=((1+i)/(√(2)))2^nvới n ∈ {1,2,3,....,20} thì:
A. z∈{±i}
B. z∈{±2}
C. z∈{±1,±i}
D. z∈{±4,±i,0} Đáp án là: C. z∈{±1,±i} </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ý kiến nào nói đúng nhất mục đích của việc nói giảm nói tránh?
A. Để nhấn mạnh, gây ấn tượng và tăng sức biểu cảm cho sự vật, hiện tượng được nói đến trong câu.
B. Để người nghe thấm thía được vẻ đẹp hàm ẩn trong cách nói kín đáo giàu cảm xúc.
C. Để tránh gây cảm giác đau buồn, ghê sợ, nặng nề; tránh thô tục, thiếu lịch sự.
D. Để bộc lộ thái độ, tình cảm, cảm xúc của người nói. Đáp án là: C. Để tránh gây cảm giác đau buồn, ghê sợ, nặng nề; tránh thô tục, thiếu lịch sự. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có thể dùng axit nào sau đây để hòa tan hoàn toàn hỗn hợp gồm: Al, Fe, Pb, Ag?
A. HCl
B. HNO 3 loãng
C. H 2 SO 4 loãng
D. H 2 SO 4 đặc nguội. Đáp án là: B. HNO 3 loãng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các dung dịch riêng biệt sau: NaNO 3, HCl, KCl HNO 3. Chỉ dùng quỳ tím và dung dịch AgNO 3 có thể phân biệt được:
A. 1 dung dịch.
B. 2 dung dịch.
C. 3 dung dịch.
D. 4 dung dịch. Đáp án là: D. 4 dung dịch </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tập tính ở động vật đới lạnh là?
A. Ngủ đông, di cư tránh rét
B. Hoạt động ban đêm
C. Chịu khát và khả năng đi xa tốt
D. Di chuyển bằng cách quăng thân Đáp án là: A. Ngủ đông, di cư tránh rét </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ứng dụng của glucozơ là
A. Dùng để pha huyết thanh
B. Tráng gương, tráng ruột phích
C. Sản xuất rượu etylic
D. Cả A, B, C đều đúng Đáp án là: D. Cả A, B, C đều đúng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Education _____ to be the most important element to develop acountry
A. often be considered
B. can often consider
C. can often considered
D. can often be considered Đáp án là: D. can often be considered </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tom invites Susan to go to the cinema. Tom: “Would you like to go to the cinema with me this weekend?” Susan: “__________.
A. Yes, I’d love to
B. Yes, I do
C. I agree with you
D. Yes, it is Đáp án là: A. Yes, I’d love to </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I would have crashed the car ________.
A. unless you warned me
B. in case you warn me
C. if there were a warning
D. but for your warning Đáp án là: D. but for your warning </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The table____ legs are broken should be repaired.
A. who
B. whom
C. which
D. whose Đáp án là: C. which </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dùng thuyết lượng tử ánh sáng không giải thích được:
A. hiện tượng quang – phát quang
B. hiện tượng giao thoa ánh sáng
C. nguyên tắc hoạt động của pin quang điện
D. hiện tượng quang điện ngoài Đáp án là: B. hiện tượng giao thoa ánh sáng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word that best fits the blank space in the following passage. The majority of families in Vietnam are (11)__________ families, where three or more generations live in the same house and take care of each other. Extended families look similar to a mini society, in which the most elderly have the strongest voice and are (12)_________ for most activities in their house. The younger generation shows respect for the older generation and vice versa, the old generation tolerates the young. The children are expected to ask for their parents' views on their activities or plans. As a member of family, one person receives both moral and material (13)_____ from other members, particularly when he or she is in trouble. Vice versa, he or she is expected to help other members in his or her family when they are in need. In general, families are expected to be a source of comfort, where every member may feel (14)_________ when getting together. However, the findings from a recent study show that these days, more newly-married couples in Vietnam choose to live in a nuclear family. They would prefer to obtain privacy in their family life and to avoid possible (15)_________ when different generations live together.
A. nuclear
B. small
C. extended
D. large Đáp án là: C. extended </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The police have begun an _________ into the accident which happened this afternoon.
A. investigation
B. investigating
C. investigatory
D. i nvestigate Đáp án là: A. investigation </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các kim loại: Al, Cr, Hg, W. Kim loại có nhiệt độ nóng chảy thấp nhất, cao nhất tương ứng là
A. Hg, Al.
B. Al, Cr.
C. Hg, W.
D. W, Cr. Đáp án là: C. Hg, W. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các chất nhiễm điện: I. Do cọ sát; II. Do tiếp xúc; III. Do hưởng ứng. Những cách nhiễm điện có thể chuyển dời electron từ vật này sang vật khác là:
A. I và II
B. III và II
C. I và III
D. chỉ có III Đáp án là: A. I và II </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong mặt phẳng Oxy, phép quay tâm O góc quay 90° biến đường thẳng d: x − y + 1 = 0 thành đường thẳng có phương trình là:
A. x + y − 3 = 0;
B. x − y + 1 = 0;
C. x − y + 3 = 0;
D. x + y + 1 = 0. Đáp án là: D. x + y + 1 = 0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các mối liên hệ và quan hệ giữa các đối tượng địa lí được gọi là các quan hệ
A. nhân - quả.
B. thống nhất.
C. chặt chẽ.
D. liên kết. Đáp án là: A. nhân - quả. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lựa chọn đáp án đúng nhất:Cho hình lập phương có diện tích xung quanh bằng 16cm^2. Tính thể tích của hình lập phương đó.
A. 8cm^3
B. 27cm^3
C. 64cm^3
D. 125cm^3 Đáp án là: A. 8cm^3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phân tử H 2 được hình thành từ
A. 2 nguyên tử H, trong đó 1 nguyên tử H nhận thêm 1 electron và 1 nguyên tử H nhường đi 1 electron.
B. 2 nguyên tử H bởi sự góp chung electron.
C. 2 nguyên tử H, trong đó mỗi nguyên tử H nhận thêm 1 electron.
D. 2 nguyên tử H, trong đó mỗi nguyên tử H nhường đi 1 electron. Đáp án là: B. 2 nguyên tử H bởi sự góp chung electron. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiến thắng nào của quân dân miền Nam Việt Nam trong giai đoạn 1965 - 1968 đã buộc Mĩ phải thừa nhận sự thất bại của chiến lược chiến tranh cục bộ?
A. Chiến thắng Vạn Tường (Quảng Ngãi).
B. Chiến thắng Núi Thành (Quảng Nam).
C. Chiến tháng mùa khô (1966 - 1967).
D. Tổng tiến công và nổi dậy Xuân Mậu Thân. Đáp án là: D. Tổng tiến công và nổi dậy Xuân Mậu Thân </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có 115 túi đường, mỗi túi có 2kg đường. Người ta bán đi 155kg đường. Hỏi còn lại bao nhiêu ki-lô-gam đường?
A. 89 kg đường
B. 120 kg đường
C. 75 kg đường
D. 100 kg đường Đáp án là: C. 75 kg đường </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một người đi xe máy trên một con đường lát bê tông. Trên đường đó có các rãnh nhỏ cách đều nhau. Nếu không đèo hàng thì xe xóc mạnh nhất khi đi với tốc độ v 1 và nếu đèo hàng thì xe xóc mạnh nhất khi đi với tốc độ v 2. Chọn phương án đúng.
A. v 1 = 2 v 2
B. v 1 = v 2
C. v 1 < v 2
D. v 1 > v 2 Đáp án là: D. v 1 > v 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tác dụng nổi bật của tia hồng ngoại là tác dụng
A. quang điện.
B. thắp sáng.
C. nhiệt.
D. hóa học (làm đen phim ảnh). Đáp án là: C. nhiệt. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây đúng?
A. Chất béo là thành phần chính của dầu mỡ động vật.
B. Chất béo tan trong nước, nhẹ hơn nước nhưng không tan trong dung môi hữu cơ.
C. Dầu ăn và mỡ bôi trơn có cùng thành phần nguyên tố.
D. Chất béo là đieste của glixerol và axit béo Đáp án là: B. Chất béo tan trong nước, nhẹ hơn nước nhưng không tan trong dung môi hữu cơ. </s> | [
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1963,
29874,
30103,
29873,
289,
347,
31500,
207,
140,
29884,
1055,
... | [
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<s> Chọn đáp án đúng với câu hỏi: Mary is talking to a porter in the hotel lobby. Porter: “Shall I help you with your suitcase?” - Mary: “_______”
A. Not a chance.
B. That's very kind of you.
C. I can’t agree more.
D. What a pity! Đáp án là: B. That's very kind of you. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiếu một chùm tia sáng mặt trời vào một bể nước có pha phẩm màu. Dưới đáy bể có một gương phẳng. Nếu cho chùm tia phản xạ trở lại không khí chiếu vào khe của một máy quang phổ thì sẽ thu được quang phổ nào sau đây
A. Quang phổ liên tục
B. Quang phổ vạch phát xạ
C. Quang phổ hấp thụ
D. Không có quang phổ Đáp án là: C. Quang phổ hấp thụ </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho biết y tỉ lệ thuận với x theo hệ số tỉ lệ 2 và z tỉ lệ thuận với x theo hệ số tỉ lệ 4/3. Khi đó z tỉ lệ thuận với y theo hệ số tỉ lệ bằng:
A. 3/2;
B. 8/3;
C. 2/3;
D. (-2)/3. Đáp án là: C. 2/3; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tơ nào sau đây có nguồn gốc tự nhiên :
A. Tơ nitron
B. Tơ tằm
C. Tơ lapsan
D. Tơ vinilon Đáp án là: B. Tơ tằm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Số liền trước của số - 30 là số
A. -29
B. 0
C. -38
D. -31 Đáp án là: D. -31 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một ca nô chạy thẳng đều xuôi theo dòng từ bến A đến bến B cách nhau 36 km mất một khoảng thời gian là 1h 30 phút. Vận tốc của dòng chảy là 6 km/h. Tính khoảng thời gian để ca nô chạy ngược dòng từ B đến A.
A. 1h 30 phút
B. 3h
C. 2h 15 phút
D. 2h Đáp án là: B. 3h </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khoanh vào chữ cái đặt trước câu trả lời đúng :c) Giá trị của biểu thức 67 x 15 – 57 x 15 là :
A. 150
B. 14220
C. 3819
D. 1500 Đáp án là: A. 150 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là sai?
A. Tất cả hạt nhân nguyên tử được cấu tạo bởi 2 loại hạt là proton và nơtron.
B. Trong nguyên tử số proton bằng số electron.
C. Trong nguyên tử số proton luôn bằng số hiệu nguyên tử Z.
D. Khối lượng của nguyên tử tập trung chủ yếu ở khối lượng của hạt nhân nguyên tử. Đáp án là: A. Tất cả hạt nhân nguyên tử được cấu tạo bởi 2 loại hạt là proton và nơtron. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chỉ ra công thức đúng của định luật Cu-lông trong chân không
A.
B.
C.
D. Đáp án là: A. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Being so close to the animals is an once-in-a-lifetime experience. (4) ____ species,
A. Environmental
B. Obsolete
C. Extinct
D. Endangered Đáp án là: D. Endangered </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn V lít hơi một amin X (no, mạch hở, đơn chức, bậc 1) bằng O 2 vừa đủ thì thu được 12V hỗn hợp khí và hơi gồm CO 2, H 2 O và N 2. Các thể tích khí đều đo ở cùng điều kiện nhiệt độ, áp suất. Số đồng phân cấu tạo thỏa mãn các điều kiện trên của X là
A. 6.
B. 9
C. 8
D. 7 Đáp án là: C. 8 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: (30) ______, the concept is the same in which the service allows users to share their videos
A. So
B. However
C. As
D. Although Đáp án là: B. However </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phân số lớn nhất trong các phân số 3/4; 7/7; 3/2; 4/3 là
A. 3/4
B. 7/7
C. 3/2
D. 4/3 Đáp án là: C. 3/2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: When (25)_______ visual signals are not possible, more formal signals may be needed.
A. their
B. These
C. This
D. That Đáp án là: B. These </s> | [
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678,
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29876,
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1932,
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526,
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<s> Chọn đáp án đúng với câu hỏi: Nguyên nhân chủ yếu của sự thay đổi nhiệt độ từ Bắc vào Nam ở nước ta là
A. chiều dài lãnh thổ và gió mùa Đông Bắc.
B. gió mùa Đông Bắc và vĩ độ địa lí.
C. vĩ độ địa lí và Mặt Trời lên thiên đỉnh.
D. Mặt Trời lên thiên đỉnh và gió mùa Đông Bắc. Đáp án là: A. chiều dài lãnh thổ và gió mùa Đông Bắc. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ở các lò luyện kim loại, công nhân thường đội một chiếc mũ có tấm kính chắn trước mặt gọi là "kính chống nóng". Tác dụng của tấm kính này dùng để chắn
A. Tia gama
B. Tia X
C. Tia hồng ngoại
D. Tia tử ngoại Đáp án là: C. Tia hồng ngoại </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population.
A. basic elements
B. are
C. tabulating
D. and to sample Đáp án là: B. are </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nếu chọn mặt đất làm mốc để tính thế năng thì trong các vật sau đây vật nào không có thế năng?
A. Máy bay đang bay
B. Xe máy đang chuyển động trên mặt đường
C. Chiếc lá đang rơi
D. Quyển sách đặt trên bàn Đáp án là: D. Quyển sách đặt trên bàn </s> | [
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<s> Chọn đáp án đúng với câu hỏi: T h ổi 0, 25 m o l k h í e t il e n q ua 125 m l d u ng d ị c h K M n O 4 1M t r o ng m ô i t r ư ờ ng t r ung tí n h ( h i ệ u su ấ t 1 00 % ) khối l ư ợ ng e t y l e ng l i c o l t h u đư ợ c b ằ n g
A. 1 1, 625 g
B. 23, 25 g.
C. 1 5, 5 g.
D. 31 g. Đáp án là: C. 1 5, 5 g. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một hình chữ nhật có chiều dài 17 m, chiều rộng 6 m. Diện tích của hình chữ nhật đó là:
A. 23 m
B. 46 m
C. 102 m^2
D. 46 m^2 Đáp án là: C. 102 m^2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ai là người vạch ra kế hoạch khai thác thuộc địa lần thứ hai của thực dân Pháp ở Đông Dương?
A. Nestor Roume.
B. Paul Beau.
C. Pôn Đu-me.
D. An be - Xa rô. Đáp án là: D. An be - Xa rô </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tác động của khí hậu nhiệt đới ẩm gió mùa tới vùng núi đá vôi được thể hiện:
A. làm bề mặt địa hình bị cắt xẻ mạnh.
B. bào mòn lớp đất trên mặt tạo nên đất xám bạc màu.
C. tạo nên hẻm vực, khe sâu, sườn dốc
D. tạo nên các hang động ngầm, suối cạn, thung khô. Đáp án là: D. tạo nên các hang động ngầm, suối cạn, thung khô </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn phát biểu đúng.
A. Có thể tạo ánh sáng vàng bằng cách chiếu ánh sáng trắng qua một tấm lọc màu vàng
B. Bút Laze khi hoạt động thì phát ra ánh sáng xanh
C. Ánh sáng do đèn pha ôtô phát ra là ánh sáng vàng
D. Bất kỳ nguồn sáng nào cũng phát ra ánh sáng trắng Đáp án là: A. Có thể tạo ánh sáng vàng bằng cách chiếu ánh sáng trắng qua một tấm lọc màu vàng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 27,48 gam axit picric vào bình kín dung tích 20 lít rồi nung nóng ở nhiệt độ cao để phản ứng xảy ra hoàn toàn thu được hỗn hợp khí gồm CO 2, CO, N 2 và H 2. Giữ bình ở 1223 0 C thì áp suất của bình là P atm. Giá trị của P là:
A. 7,724 atm
B. 6,624 atm
C. 8,32 atm
D. 5,21 atm Đáp án là: B. 6,624 atm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Peter : “What________ your flight?” Mary : “There was a big snowstorm in Birmingham that delayed a lot of flights.”
A. held up
B. postponed up
C. delayed up
D. hung up Đáp án là: A. held up </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A. hobby B. luggage C. market D. machine
A. hobby
B. luggag
C. market
D. machine Đáp án là: D. machineA </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A tropical storm is called a... in Australia.
A. hurricane
B. typhoon
C. tornado
D. cyclone Đáp án là: D. cyclone </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,
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1,
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1,
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1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Throughout the passage, the author implies that the Mandans ________.
A. planned for the future
B. were open to strangers
C. valued individuality
D. were very adventurous Đáp án là: A. planned for the future </s> | [
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29901,
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449,
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278,
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10469,
393,
278,
15419,
5... | [
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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 ofprimary stress in each of the following questions.
A. tenant
B. common
C. rubbish
D. machine Đáp án là: D. machine </s> | [
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350,
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315,
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470,
360,
373,... | [
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tia tới song song với trục chính của thấu kính phân kỳ cho 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. Đáp án là: D. có đường kéo dài đi qua tiêu điểm </s> | [
1,
1,
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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: Hòa tan m gam hỗn hợp X gồm Al và Na có tỉ lệ mol 1:2 vào nước dư thu được 4,48 lít khí (đktc). Giá trị của m là
A. 5,84.
B. 6,15.
C. 7,30.
D. 3,65. Đáp án là: A. 5,84. </s> | [
1,
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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: Choose the word with differently pronounced underlined parts
A. a ccurate
B. d a te
C. t a le
D. sh a pe Đáp án là: A. a ccurate </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Quãng đường AB dài 120km. Lúc 7 giờ 30 phút một ô tô đi từ A đến B với vận tốc 50 km/giờ và nghỉ trả khách 45 phút. Sau đó ô tô đi từ B về A với vận tốc 60 km/giờ. Hỏi ô tô về đến A lúc mấy giờ?
A. 12 giờ 39 phút
B. 12 giờ 19 phút
C. 11 giờ 54 phút
D. 11 giờ 9 phút Đáp án là: A. 12 giờ 39 phút </s> | [
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Các dân tộc ít người sinh sống ở Đồng bằng sông Cửu Long là
A. Khơ me, Chăm, Hoa.
B. Giáy, Dao, Mông.
C. Tày, Nùng, Thái.
D. Gia Rai, Ê Đê, Ba Na. Đáp án là: A. Khơ me, Chăm, Hoa. </s> | [
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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: Hoạt động của Operon Lac có thể sai xót khi các cùng, các gen bị đột biến. Các vùng, các gen khi bị đột biến thường được ký hiệu bằng các dấu “-“ trên đầu các chữ cái (R-, P-, O-, Z-), cho các chủng sau: 1. Chủng 1: R + P – O + Z + Y + A + 2. Chủng 2: R – P + O + Z + Y + A + 3. Chủng 3: R + P – O + Z + Y + A + / R + P + O + Z – Y + A + 4. Chủng 4: R + P – O – Z + Y + A + / R + P – O + Z – Y + A + Trong môi trường có đường lactose chủng nào không tạo ra sản phẩm β – galactosidase
A. 1,2,3
B. 1,3,4
C. 1,2,3
D. 2,3,4 Đáp án là: B. 1,3,4 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho 1,11g một kim loại tác dụng với nước, thu được 1,776 lít hiđro (đktc). Kim loại đó là:
A. Li;
B. Na;
C. K;
D. Rb. Đáp án là: C. K; </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Đứng đầu phe Hiệp ước vào cuối năm 1918 là
A. Pháp
B. Anh
C. Mĩ
D. Nga Đáp án là: C. Mĩ </s> | [
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1,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Điện phân 200 ml dung dịch X chứa CuSO 4 1M và NaCl 0,75M với điện cực trơ, có màng ngăn. Sau một thời gian, thu được dung dịch Y có khối lượng nhỏ hơn dung dịch X là 16,125 gam. Dung dịch Y trên phản ứng vừa đủ với m gam Al. Giá trị m là
A. 3,24
B. 2,25
C. 2,16
D. 1,35 Đáp án là: B. 2,25 </s> | [
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong các phát biểu về vận tốc, câu nào dưới đây phát biểu sai?
A. Vận tốc cho biết mức độ nhanh hay chậm của chuyển động.
B. Độ lớn của vận tốc được tính bằng quãng đường đi được trong một đơn vị thời gian.
C. Công thức tính vận tốc là v = S. t
D. Đơn vị của vận tốc là km/h Đáp án là: C. Công thức tính vận tốc là v = S. t </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Dưới đây là một sô thành tựu về ứng dụng di truyền vào chọn giống: 1. Chuột nhắt chuyển gen chứa gen hoocmôn sinh trưởng của chuột cống. 2. Gen tổng hợp etylen ở cà chua bị bất hoạt. 3. Cừu Đôly. 4. Giông lúa gạo vàng có khả năng tổng hợp β-carôten trong hạt. 5. Nuôi cấy hạt phấn trong ống nghiệm rồi cho phát triển thanh cây đơn bội. Có bao nhiêu thành tựu tạo giống nhờ biến đổi gen?
A. 1.
B. 2.
C. 3.
D. 4. Đáp án là: C. 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,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Theo Tổ chức Y tế thế giới, số lượng người sống trong cảnh sinh hoạt thiếu nước ngọt là bao nhiêu?
A. Hơn 2 tỉ người.
B. Hơn 20 tỉ người.
C. Hơn 12 tỉ người.
D. 2 tỉ người. Đáp án là: A. Hơn 2 tỉ người. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Este X (có khối lượng phân tử bằng 103) được điều chế từ một ancol đơn chức (có tỉ khối hơi so với oxi lớn hơn 1) và một amino axit. Cho 25,75 gam X phản ứng hết với 300 ml dung dịch NaOH 1M, thu được dung dịch Y. Cô cạn Y, thu được m gam chất rắn. Giá trị của m là:
A. 24,25.
B. 26,25.
C. 27,75.
D. 26,82. Đáp án là: B. 26,25. </s> | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn 1 mol chất béo, thu được CO 2 và H 2 O hơn kém nhau 8 mol. Mặt khác, a mol chất béo trên tác dụng tối đa với 100 ml dung dịch Br 2 6M. Giá trị của a là
A. 0,16
B. 0,4
C. 0,2
D. 0,1 Đáp án là: D. 0,1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thân biến dạng của cây nào dưới đây khác với thân biến dạng của những cây còn lại?
A. Cỏ tranh
B. Khoai tây
C. Sen
D. Nghệ Đáp án là: B. Khoai tây </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một dây làm bằng thép có chiều dài 3m, đường kính tiết diện ngang 0,4mm. Biết thép có suất Y-âng là 2.10 11 N/m 2. Treo vào dây một vật có khối lượng 4kg. Lấy g = 10m/ s 2. Độ biến dạng của dây lúc này là
A. 4,8 mm.
B. 3,7 mm.
C. 8,5 mm.
D. 7,3 mm. Đáp án là: A. 4,8 mm. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cơ sở tế bào học của quy luật phân ly là
A. Sự phân li và tổ hợp của cặp NST tương đồng trong giảm phân và thụ tinh.
B. Sự phân li và tổ hợp của cặp NST tương đồng trong giảm phân và thụ tinh đưa đến sự phân li và tổ hợp của các alen trong cặp.
C. Sự phân li của các alen trong cặp trong giảm phân.
D. Sự phân li của cặp NST tương đồng trong giảm phân. Đáp án là: B. Sự phân li và tổ hợp của cặp NST tương đồng trong giảm phân và thụ tinh đưa đến sự phân li và tổ hợp của các alen trong cặp. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc gồm lò xo độ cứng bằng 40 N/m gắn với một vật nặng có khối lượng bằng 400 g. Hệ được treo trên mặt phẳng nghiêng góc 30 0 so với phương ngang. Hệ số ma sát giữa vật nặng và mặt phẳng nghiêm bằng 0,1. Đưa vật nặng đến vị trí lò xo dãn 18 cm rồi thả nhẹ. Lấy g = 10 m/s 2. Tổng quãng đường vật nặng đi được cho đến khi dừng hẳn bằng
A. 84,50 cm
B. 187,06 cm
C. 162,00 cm
D. 97,57 cm Đáp án là: D. 97,57 cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nguồn tài nguyên rừng bị suy giảm do đâu?
A. Khai thác rừng.
B. Cháy rừng.
C. Biến đổi khí hậu.
D. Khai thác khoáng sản. Đáp án là: A. Khai thác rừng. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Từ trường không tồn tại ở đâu?
A. xung quanh nam châm
B. xung quanh điện tích đứng yên
C. xung quanh dòng điện
D. xung quanh Trái Đất Đáp án là: B. xung quanh điện tích đứng yên </s> | [
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<s> Chọn đáp án đúng với câu hỏi: In spite of his poverty, he led a devoted life to the revolutionary cause.
A. He could not devote his life to the revolutionary cause because of his poverty.
B. Although he was poor, he led a devoted life to the revolutionary cause.
C. If he had not been so poor, he could have devoted his life to the revolutionary cause.
D. He led a devoted life to the revolutionary cause, but he was so poor. Đáp án là: A. He could not devote his life to the revolutionary cause because of his poverty. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hệ tuần hoàn kín đơn có ở những động vật nào? 1. Mực ống, bạch tuộc 2. Giun đốt 3. Lưỡng cư 4. Chân đầu 5. Chim 6. Cá
A. 1, 2, 4, 5
B. 1, 3, 4, 6
C. 2, 4, 5, 6
D. 1, 2, 4, 6 Đáp án là: D. 1, 2, 4, 6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the sentences with given words If/ there/ be/ fire/ in/ your house, call/ 114.
A. If there is a fire in your house, to call 114.
B. If there is a fire in your house, calling 114.
C. If there be a fire in your house, call 114.
D. If there is a fire in your house, call 114. Đáp án là: D. If there is a fire in your house, call 114 </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hai con lắc lò xo M và N giống hệt nhau, đầu trên của hai lò xo được cố định ở cùng một giá đỡ nằm ngang. Vật nặng của mỗi con lắc dao động điều hòa theo phương thẳng đứng với biên độ của con lắc M là A, của con lắc N là A 3. Trong quá trình dao động chênh lệch độ cao lớn nhất của hai vật là A. Khi động năng của con lắc M cực đại và bằng 0,12J thì động năng của con lắc N là
A. 0,08J.
B. 0,27J.
C. 0,12J.
D. 0,09J. Đáp án là: B. 0,27J. </s> | [
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong các hàm số sau, hàm số nào đồng biến:
A.y=−x+1
B.y=−2x+1
C.y=6−2(x+1)
D.y=2/3+2x Đáp án là: D.y=2/3+2x </s> | [
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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 correct answer to each of the following questions. If you freeze water, it _______ solid.
A. becomes
B. become
C. becoming
D. became Đáp án là: A. becomes </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một trong những nhân vật điển hình của nền âm nhạc thế giới thời kì cận đại là
A. Trai-cốp-xki.
B. Hô-xe Ri-dan.
C. Hô-xê Mác-ti.
D. Pi-cát-xô. Đáp án là: A. Trai-cốp-xki. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hãng công nghiệp chế tạo nổi tiếng của Nhật Bản không phải là
A. Nissan
B. Hitachi
C. Electric
D. Mitsubisi Đáp án là: C. Electric </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hóa trị cùa Fe trong công thức Fe 2 (SO 4 ) 3 là:
A. I
B. II
C. III
D. IV Đáp án là: C. III </s> | [
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1,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho mặt cầu có phương trình (S):x^2+y^2+z^2−2x+4y=0. Tọa độ tâm và bán kính của mặt cầu là:
A. Tâm I(1; −2; 0), bán kính R=√(5).
B. Tâm I(1; −2; 0), bán kính R=5.
C. Tâm I(−1; 2; 0), bán kính R=√(5).
D. Tâm I(−1; 2; 0), bán kính R=5. Đáp án là: A. Tâm I(1; −2; 0), bán kính R=√(5). </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Soon after Mel has finished his thesis, he will leave for Boston, where he has a job waiting on him.
A. has finished
B. will leave
C. where
D. on him Đáp án là: D. on him </s> | [
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1,
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các cặp cơ quan sau: I. Chân chuột chũi và chân dế chũi. II. Gai cây hoàng liên và gai cây hoa hồng. III. Gai cây hoa hồng và gai cây xương rồng. IV. Nọc độc của rắn và nọc độc của bọ cạp. Số cặp cơ quan tương tự là
A. 3
B. 1
C. 2
D. 4 Đáp án là: D. 4 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: The museum is closed ______ Mondays.
A. at
B. in
C. on
D. by Đáp án là: C. on </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Khi nói về quá trình hô hấp ở thực vật, phát biểu nào sau đây đúng?
A. Cường độ hô hấp phụ thuộc vào nhu cầu năng lượng của tế bào.
B. Quá trình hô hấp gây tổn hại rất lớn cho thực vật
C. Nếu nồng độ CO 2 cao thì hô hấp ở thực vật càng mạnh mẽ.
D. Quá trình hô hấp sáng gây lãng phí sản phẩm quang hợp cho cây C 4. Đáp án là: A. Cường độ hô hấp phụ thuộc vào nhu cầu năng lượng của tế bào. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Neither my dad nor my mom _____ of the idea.
A. convinced
B. have convinced
C. was convinced
D. were convinced Đáp án là: C. was convinced </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một lớp có 31 học sinh nam và 16 học sinh nữ. Có bao nhiêu cách chọn một học sinh làm lớp trưởng của lớp.
A. 31;
B. 16;
C. 47;
D. 15. Đáp án là: C. 47; </s> | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: They didn't play badminton yesterday...........?
A. Do they
B. Did they
C. Don't they
D. Weren't they Đáp án là: B. Did they </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... |
<s> Chọn đáp án đúng với câu hỏi: Theo quy tắc cộng Maccopnhicop, propen phản ứng với HCl, thu được sản phẩm chính là:
A. 1-clopropan
B. propan
C. 2-clopropan
D. 1,2-điclopropan Đáp án là: C. 2-clopropan </s> | [
1,
1,
29871,
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29976,
29886,
29871,
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865,
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29875,
29901,
450,
29877,
439,
29891,
11062,
207,
137,
30103,
29883,
1302,
31214,
... | [
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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... |
<s> Chọn đáp án đúng với câu hỏi: Cuộc kháng chiến chống Mĩ của nhân dân Lào giành được thắng lợi to lớn trong năm 1973, buộc Mĩ phải
A. kí Hiệp định Viêng Chăn về lập lại hoà bình ở Lào.
B. công nhận độc lập, chủ quyền, thống nhất và toàn vẹn lãnh thổ của Lào.
C. kí Hiệp định Pari về lập lại hoà bình và thực hiện hoà hợp dân tộc ở Lào.
D. tuyên bố rút quân Mĩ và quân đồng minh của Mĩ ra khỏi Lào. Đáp án là: A. kí Hiệp định Viêng Chăn về lập lại hoà bình ở Lào. </s> | [
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm các chất Y (C 5 H 14 N 2 O 4 ) và chất Z (C 4 H 8 N 2 O 3 ). Trong đó, Y là muối của axit hai chức, Z là đipeptit mạch hở. Cho 21,5 gam X tác dụng với dung dịch NaOH dư, đun nóng, thu được 0,1 mol hỗn hợp khí đều làm xanh quỳ tím ẩm, tỉ khối của mỗi khí so với không khí đều lớn hơn 1. Mặt khác 21,5 gam X tác dụng với dung dịch HCl dư đun nóng thu được m gam chất hữu cơ. Giá trị của m là
A. 32,45.
B. 37,90.
C. 34,25.
D. 28,80 Đáp án là: C. 34,25. </s> | [
1,
1,
29871,
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29876,
29871,
30128,
29976,
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29871,
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29901,
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1060,
748,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào là mốc đánh dấu chế độ xã hội chủ nghĩa ở Liên Xô sụp đổ?
A. Nhà nước Liên Xô bị tê liệt.
B. Các nước cộng hòa đua nhau giành độc lập.
C. Cộng đồng các quốc gia độc lập được thành lập.
D. Lá cờ Liên bang Xô viết trên nóc điện Crem-li bị hạ xuống. Đáp án là: D. Lá cờ Liên bang Xô viết trên nóc điện Crem-li bị hạ xuống </s> | [
1,
1,
29871,
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865,
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29875,
274,
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228,
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29901,
2166,
207,
158,
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413,
347,
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31500,
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1055,
30712,
... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Chọn phát biểu sai. Độ lớn của lực ma sát trượt
A. phụ thuộc vào diện tích tiếp xúc của vật
B. không phụ thuộc vào tốc độ của vật
C. tỉ lệ với độ lớn của áp lực
D. phụ thuộc vào vật liệu và tính chất của hai mặt tiếp xúc Đáp án là: A. phụ thuộc vào diện tích tiếp xúc của vật </s> | [
1,
1,
29871,
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30975,
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865,
325,
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274,
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298,
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29875,
29901,
14542,
31214,
29876,
1374,
29874,
30103,
29873,
289,
347,
31500,
207,... | [
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: Ngoài sáng tác văn học, Hoàng Phủ Ngọc Tường từng làm công việc nào sau đây?
A. Dạy học
B. Họa sĩ
C. Nhạc sĩ
D. Bác sĩ Đáp án là: A. Dạy học </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
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30030,
865,
325,
31280,
29875,
274,
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298,
228,
190,
146,
29875,
29901,
405,
1484,
29874,
30712,
29875,
872,
30103,
865,
11062,
30103,
29883,... | [
1,
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,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đơn phân của ADN gồm những loại nucleotit nào?
A. A, T, U, X
B. A, U, G, X
C. A, T, G, X
D. U, T, G, X Đáp án là: C. A, T, G, X </s> | [
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29976,
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2723... | [
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1... |
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