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<s> Chọn đáp án đúng với câu hỏi: Every year between 200 and 300 people (4)_____ injured during the run (5)_______ most injuries are due to falls and are not serious.
A. are
B. were
C. have been
D. had been Đáp án là: A. are </s> | [
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<s> Chọn đáp án đúng với câu hỏi: You should be more respectable of other people’s points of view. Don’t embarrass someone even if they are wrong.
A. should be
B. respectable
C. points of view.
D. embarrass Đáp án là: B. respectable </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các trung tâm tài chính ngân hàng lớn nhất thế giới hiện nay là
A. Niu Y-oóc, Luân-đôn, Tô-ky-ô, Xin-ga-po.
B. Niu Y-oóc, Luân-đôn, Tô-ky-ô, Phran-phuốc.
C. Niu Y-oóc, Luân-đôn, Tô-ky-ô, Niu Đê-li.
D. Niu Y-oóc, Luân-đôn, Tô-ky-ô, Thượng Hải. Đáp án là: D. Niu Y-oóc, Luân-đôn, Tô-ky-ô, Thượng Hải </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm năng lượng tỏa ra khi một hạt nhân urani U 234 phóng xạ tia α tạo thành đồng vị thori Th 230. Cho các năng lượng liên kết riêng của hạt α là 7,10 MeV; của U 234 là 7,63 MeV; của Th 230 là 7,70 MeV.
A. 15 MeV.
B. 13 MeV.
C. 12 MeV.
D. 14 MeV. Đáp án là: D. 14 MeV </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thời cơ “ngàn năm có một” để nhân dân Việt Nam tổng khởi nghĩa giành chính quyền năm 1945 kết thúc khi
A. Quân Đồng minh vào Đông Dương giải giáp quân đội Nhật.
B. Thực dân Pháp bắt đầu nổ súng xâm lược trở lại Việt Nam.
C. Nhật cùng thực dân Anh chống phá chính quyền cách mạng.
D. Nhật giao Đông Dương cho quân Trung Hoa Dân quốc. Đáp án là: A. Quân Đồng minh vào Đông Dương giải giáp quân đội Nhật. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thể thơ 5 chữ, giọng điệu thiết tha, rạo rực, nhiều hình ảnh thiên nhiên giàu sức gợi cảm. Đó là bài thơ nào?
A. Viếng lăng Bác
B. Con cò
C. Mây và sóng
D. Sang thu Đáp án là: D. Sang thu </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm nào sau đây không đúng với nền nông nghiệp hàng hoá?
A. Người dân quan tâm nhiều hơn đến thị trường tiêu thụ sản phẩm.
B. Mục đích sản xuất là tạo ra nhiều lợi nhuận.
C. Đẩy mạnh thâm canh, chuyên môn hoá, sử dụng ngày càng nhiều máy móc.
D. Mỗi cơ sở sản xuất, mỗi địa phương đều sản xuất rất nhiều loại sản phẩm. Đáp án là: D. Mỗi cơ sở sản xuất, mỗi địa phương đều sản xuất rất nhiều loại sản phẩm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vì sao cây lược lại có một ý nghĩa quý giá, thiêng liêng đối với ông Sáu?
A. Vì nó làm dịu đi nỗi ân hận và chứa đựng bao nhiêu tình cảm yêu mến, nhớ thương, mong đợi của người cha đối với đứa con trong xa cách.
B. Vì nó chứng tỏ ông là người biết giữ đúng lời hứa với đứa con gái bé bỏng.
C. Vì ông đã mất bao nhiêu công sức và thời gian để làm ra chiếc lược.
D. Vì lúc bấy giờ việc có được một cây lược làm bằng ngà voi là vô cùng hiếm hoi. Đáp án là: A. Vì nó làm dịu đi nỗi ân hận và chứa đựng bao nhiêu tình cảm yêu mến, nhớ thương, mong đợi của người cha đối với đứa con trong xa cách. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Câu ca dao “Ngó lên nuộc lạt mái nhà/ Bao nhiêu nuộc lạt nhớ ông bà bấy nhiêu” thuộc chủ đề nào?
A. Tình cảm gia đình
B. Tình yêu quê hương, đất nước
C. Than thân
D. Châm biếm Đáp án là: A. Tình cảm gia đình </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm một số, biết rằng nếu lấy số đó trừ đi 30 rồi cộng 6, được bao nhiêu đem chia cho 8 thì được kết quả là 2
A. 45
B. 40
C. 38
D. 35 Đáp án là: B. 40 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho đoạn mạch RLC nối tiếp có R thay đổi được. Đặt vào hai đầu mạch điện áp xoay chiều ổn định. Khi R lần lượt là 18 Ω, 20 Ω, 24 Ω, 28 Ω, 32 Ω, 36 Ω thì công suất tiêu thụ của đoạn mạch lần lượt là P 1,P 2,P 3,P 4,P 5,P 6. Biết P 1 = P 5. Giá trị công suất lớn nhất trong các giá trị trên là.
A. P 1.
B. P 3.
C. P 4.
D. P 6. Đáp án là: B. P 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tổ chức nào sau đây không phải là tiền thân của Liên minh châu Âu?
A. Cộng đồng Kinh tế châu Âu
B. Cộng đồng châu Âu về nguyên tử
C. Cộng đồng Than và thép châu Âu
D. Cộng đồng châu Âu về quân sự Đáp án là: D. Cộng đồng châu Âu về quân sự </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn 4,48 lít khí etilen ở đktc cần dùng V lít khí oxi ở đktc. Giá trị của V là
A. 11,20 lít
B. 12,56 lít
C. 13,44 lít
D. 14,65 lít Đáp án là: C. 13,44 lít </s> | [
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1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
29871,
30250,
29877,
31500,
30103,
29873,
10329,
30103,
29891,
5089,
... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho đến nay, trong sản lượng thịt của chăn nuôi ở nước ta, sản lượng thịt các loại của đàn lợn chiếm
A. 1/2.
B. 2/3.
C. 3/4.
D. 4/5. Đáp án là: C. 3/4. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kim loại có nhiệt độ nóng chảy cao nhất là
A. Hg
B. Ag.
C. W
D. Fe Đáp án là: C. W </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một gia đình nhốt đều số thỏ nuôi vào 5 chuồng.Nếu đếm số thỏ nuôi trong 2 chuồng thì được 10 con. Hỏi gia đình đó nuôi bao nhiêu con thỏ
A. 12 con thỏ
B. 15 con thỏ
C. 20 con thỏ
D. 25 con thỏ Đáp án là: D. 25 con thỏ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biện pháp nào sau đây làm kim loại bị ăn mòn nhanh?
A. Bôi dầu, mỡ lên bề mặt kim loại.
B. Sơn, mạ lên bề mặt kim loại.
C. Để đồ vật nơi khô ráo, thoáng mát.
D. Ngâm kim loại trong nước muối một thời gian. Đáp án là: D. Ngâm kim loại trong nước muối một thời gian </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 2,0 gam hỗn hợp X gồm metylamin, đimetylamin phản ứng vừa đủ với 0,05 mol HCl, thu được m gam muối. Giá trị của m là:
A. 4,725.
B. 2,550.
C. 3,425.
D. 3,825. Đáp án là: D. 3,825 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho công thức chung của các axit cacboxylic sau: (I) Axit đơn chức C x H y COOH. (II) Axit hai chức C x H y (COOH) 2. (III) Axit đa chức no C n H 2n+2 (COOH) x (IV) Axit đơn chức có một liên kết π ở gốc C n H 2n-1 COOH (n ≥ 2). (V) Axit đơn chức no C n H 2n+2 O 2 (n ≥ 1). Những công thức chung của các axit cacboxylic nào sau đây đúng?
A. (I), (II)
B. (III), (V)
C. (I), (II), (V)
D. (I), (II), (IV) Đáp án là: D. (I), (II), (IV) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Read the entire label before use and carefully follow the labelled _______ for use.
A. advice
B. guidance
C. counsels
D. directions Đáp án là: D. directions </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong bệnh viện, khi cấp cứu bệnh nhân có tim ngừng đập, bác sĩ thường sử dụng kĩ thuật sốc tim. Kĩ thuật này dựa trên tác dụng nào của dòng điện
A. Tác dụng nhiệt
B. Tác dụng từ
C. Tác dụng hóa học
D. Tác dụng sinh lí Đáp án là: D. Tác dụng sinh lí </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các công thức sau đây, công thức nào là của chất béo?
A. C 3 H 5 (OCOC 4 H 9 ) 3
B. C 3 H 5 (COOC 15 H 31 ) 3
C. C 3 H 5 (OOCC 17 H 33 ) 3
D. C 3 H 5 (COOC 17 H 33 ) 3 Đáp án là: C. C 3 H 5 (OOCC 17 H 33 ) 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Which of the following statements is TRUE, according to the passage?
A. InfoWars triumphed over several prestigious channels as the most trusted source.
B. The study by Simmons Research was carried out in America about 38 news sources.
C. The research provides information on the credibility of news media in three countries.
D. The ratings of trust or accuracy changed people’s expectations about a news article. Đáp án là: B. The study by Simmons Research was carried out in America about 38 news sources. </s> | [
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30128,
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<s> Chọn đáp án đúng với câu hỏi: invest enormous (29)_______ of money in advertising their products.
A. numbers
B. totals
C. figures
D. sums Đáp án là: D. sums </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong không gian Oxyz, cho hai mặt phẳng: (P): 5x - 3y + 2z - 19 = 0, (Q): x - y + z - 3 = 0. Tìm phương trình đường thẳng ∆ là giao tuyến của hai mặt phẳng (P), (Q).
A. (x−1)/2=(y−3)/2=(z−2)/1;
B. (x+5)/1=(y+2)/3=(z)/2;
C. (x+2)/(−1)=(y+2)/(−3)=(z)/(−2);
D. (x−5)/1=(y−2)/3=(z)/2. Đáp án là: D. (x−5)/1=(y−2)/3=(z)/2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là sai khi nói về năng lượng dao động điện từ tự do trong mạch dao động LC?
A. Năng lượng điện trường và năng lượng từ trường biến thiên điều hòa với tần số bằng một nửa tần số của cường độ dòng điện trong mạch.
B. Khi năng lượng điện trường giảm thì năng lượng từ trường tăng.
C. Năng lượng từ trường cực đại bằng năng lượng điện từ của mạch dao động.
D. Năng lượng điện từ của mạch dao động bằng tổng năng lượng điện trường tập trung ở tụ điện và năng lượng từ trường tập trung ở cuộn cảm. Đáp án là: A. Năng lượng điện trường và năng lượng từ trường biến thiên điều hòa với tần số bằng một nửa tần số của cường độ dòng điện trong mạch. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các chất: Al, Al 2 O 3, Al 2 (SO 4 ) 3, Zn(OH) 2, NaHS, K 2 SO 3, (NH 4 ) 2 CO 3. Số chất đều phản ứng được với dung dịch HCl và dung dịch NaOH là:
A. 7.
B. 6.
C. 5.
D. 4. Đáp án là: C. 5. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các hỗn hợp rắn dạng bột có tỉ lệ số mol trong ngoặc theo thứ tự chất như sau : (1) Na và Al 2 O 3 (2:1) (2) Cu và FeCl 3 (1:3) (3) Na, Ba và Al 2 O 3 (1:1:2) (4) Fe và FeCl 3 (2:1) (5) Al và K (1:2) (6) K và Sr (1:1) Có bao nhiêu hỗn hợp có thể tan hết trong nước dư?
A. 6
B. 5
C. 4
D. 3 Đáp án là: C. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngày 7 - 10 - 1917 diễn ra sự kiện lịch sử gì ở Nga?
A. Quân khởi nghĩa chiếm Cung điện Mùa Đông
B. Lê-nin có bản báo cáo quan trọng trước Trung ương Đảng Bônsêvích
C. Các đội Cận vệ đỏ nhanh chóng chiếm được những vị trí then chốt ở Thủ đô
D. Lê-nin bí mật rời Phần Lan về Pê-tơ-rô-grát, trực tiếp chỉ đạo cách mạng Đáp án là: D. Lê-nin bí mật rời Phần Lan về Pê-tơ-rô-grát, trực tiếp chỉ đạo cách mạng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nối hai cột sao cho phù hợp
A. 1 – c; 2 – b; 3 – a.
B. 1 – b; 2 – c; 3 – a.
C. 1 – a; 2 – c; 3 – b.
D. 1 – a; 2 – b; 3 – c. Đáp án là: C. 1 – a; 2 – c; 3 – b. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ý nào dưới đây không phải là nguyên tắc hoạt động của tổ chức Liên Hợp quốc?
A. Duy trì hòa bình an ninh thế giới.
B. Giải quyết các tranh chấp bằng biện pháp hòa bình.
C. Tôn trọng toàn vẹn lãnh thổ và độc lập chính trị của tất cả các nước.
D. Bình đẳng chủ quyền giữa các nước và quyền tự quyết của các dân tộc Đáp án là: A. Duy trì hòa bình an ninh thế giới. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các chất sau: Al, NaHCO 3, (NH 4 ) 2 CO 3, NH 4 Cl, Al 2 O 3, Zn, K 2 CO 3, K 2 SO 4. Có bao nhiêu chất trong dãy vừa tác dụng được với dung dịch HCl, vừa tác dụng được với dung dịch NaOH?
A. 2.
B. 3.
C. 4.
D. 5. Đáp án là: D. 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The bus fairs________three times so far this year.
A. have been risen
B. have risen
C. was risen
D. rose Đáp án là: A. have been risen </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the passage below Andrew is an Indian farmer. He gets ___________ (6) early in the morning. It is quite true to say that an Indian farmer sleeps with the lamb and rises with the lark. Then he goes with ___________ (7) buffalo to the field. The day’s work begins. Slowly the sun ___________ (8) and climbs into the sky. But the heat of the sun cannot drive him away from work. Our tropical sun shows no mercy to the Indian famer even then the latter does not brother about sun and shower. He ___________ (9) rest for a short while under a shady tree. Then once again he starts his work of ploughing, or harrowing the clods or sowing seeds and leveling the field with the help of the leveler. Or, ___________ (10) the crops are already a few inches high, he may be seen watering the fields or weeding out wild plants. All days, in the life of an India farmer, are alike but a day in the harvesting season is a day of joy in his dull life. It is a day when the Indian farmer reaps the fruits of his labour. Điền vào ô số 8
A. rises
B. rose
C. raises
D. raised Đáp án là: A. rises </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây không đúng?
A. He là nguyên tử nguyên tố có bán kính nhỏ nhất trong bảng tuần hoàn.
B. Độ âm điện ( c ) là đại lượng đặc trưng cho khả năng nhường electron liên kết của một nguyên tử trong phân tử.
C. Oxide cao nhất của một nguyên tố là oxide mà nguyên tố trong đó có hóa trị cao nhất.
D. Hydroxide của nguyên tố M hóa trị n có dạng M(OH) n. Đối với nguyên tố phi kim, hydroxide của nó ở dạng acid. Đáp án là: B. Độ âm điện ( c ) là đại lượng đặc trưng cho khả năng nhường electron liên kết của một nguyên tử trong phân tử. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một ô tô có khối lượng 2,5 tấn chuyển động với tốc độ 54km/h đi qua một chiếc cầu lồi có bán kính cong 1000m. Lấy g = 10m/s 2. Áp lực của ô tô nén lên cầu khi ô tô ở vị trí mà đướng nối tâm quỹ đạo với ô tô tạo với phương thẳng đứng một góc 30 0 là:
A. 52000 N
B. 25000 N
C. 21088 N
D. 36000 N Đáp án là: C. 21088 N </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 4 -5, cho biết tỉnh nào sau đây của nước ta không giáp biển?
A. Quảng Ninh
B. Hà Nam
C. Ninh Bình
D. Ninh Thuận Đáp án là: B. Hà Nam </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chất nào sau đây không phải là nguyên liệu của công nghiệp sản xuất xi măng?
A. Đất sét
B. Đá vôi
C. Cát
D. Thạch cao Đáp án là: C. Cát </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dung dịch phenol (C 6 H 5 OH) không phản ứng được với chất nào sau đây?
A. NaOH.
B. NaCl.
C. Br 2.
D. Na. Đáp án là: B. NaCl. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thể tích của hình hộp chữ nhật có độ dài hai cạnh đáy là 200 cm và 400 cm, chiều cao là 300 cm là:
A. 2 400 m^3;
B. 240 000 dm^3;
C. 2 400 dm^3;
D. 24 m^3. Đáp án là: C. 2 400 dm^3; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho đoạn mạch RLC nối tiếp (cuộn dây thuần cảm) với C R 2 < 2 L. Đặt vào hai đầu đoạn mạch một điện áp xoay chiều u = U 0 cos ω t V với ω thay đổi được. Điều chỉnh ω để điện áp hiệu dụng ở hai đầu bản tụ đạt cực đại, khi đó điện áp hiệu dụng trên điện trở gấp 5 lần điện áp hiệu dụng trên cuộn dây. Hệ số công suất của đoạn mạch đó
A. 5 31
B. 2 29
C. 5 29
D. 3 19 Đáp án là: C. 5 29 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho phản ứng NaOH + HCl → NaCl + H 2 O. Phản ứng hóa học nào sau đây có cùng phương trình ion thu gọn với phản ứng trên?
A. 2KOH + FeCl 2 → Fe(OH) 2 + 2KCl.
B. NaOH + NH 4 Cl → NaCl + NH 3 + H 2 O.
C. KOH + HNO 3 → KNO 3 + H 2 O.
D. NaOH + NaHCO 3 → Na 2 CO 3 + H 2 O. Đáp án là: C. KOH + HNO 3 → KNO 3 + H 2 O. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tên thay thế của hợp chất hữu cơ chứa vòng benzen có công thức phân tử thu gọn C 6 H 7 N là
A. Anilin
B. Benzylamin
C. Phenylamin
D. Benzenamin Đáp án là: D. Benzenamin </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word whose underlined part is pronounced differently from the other three in each of the following questions
A. imag ine
B. discipl ine
C. determ ine
D. Valent ine Đáp án là: D. Valent ine </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một nhóm các nguyên tử kết hợp lại tạo thành
A. Nguyên tử.
B. Phân tử.
C. Vật.
D. Chất. Đáp án là: B. Phân tử. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hỗn hợp gồm Cu 2 S và FeS 2 tác dụng hết với dung dịch chứa 0,52 mol HNO 3, thu được dung dịch X (không chứa NH 4 + ) và hỗn hợp khí gồm NO và 0,3 mol NO 2. Để tác dụng hết với các chất trong X cần dùng 260 ml dung dịch NaOH 1M, sau phản ứng lọc kết tủa nung trong không khí tới khối lượng không đổi thu được 6,4 gam chất rắn. Tổng khối lượng chất tan có trong dung dịch X gần nhất với giá trị nào sau đây?
A. 21,0
B. 19,0
C. 18,0
D. 20,0 Đáp án là: B. 19,0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mối quan hệ nào sau đây là mối quan hệ cộng sinh?
A. Làm tổ tập đoàn giữa nhạn và cò biển
B. Dây tơ hồng bám trên thân cây
C. Trùng roi sống trong ống tiêu hóa của mối
D. Cây phong lan sống bám trên cây gỗ Đáp án là: C. Trùng roi sống trong ống tiêu hóa của mối </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số f(x) = x^4 – 5x^2 + 4. Gọi S là diện tích hình phẳng giới hạn bởi đồ thị hàm số y = f(x) và trục hoành. Khẳng định nào sau đây sai?
A.S = ∫−22(f(x))dx;
B. S = 2(∫01f(x)dx)+2(∫12f(x)dx);
C. S = 2∫02(f(x))dx;
D. S = 2(∫02f(x)dx). Đáp án là: D. S = 2(∫02f(x)dx) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tên thay thế của CH 3 -CH 2 -CH 2 -CHO là
A. propan-1-al.
B. propanal.
C. butan-1-al.
D. butanal. Đáp án là: D. butanal </s> | [
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<s> Chọn đáp án đúng với câu hỏi: We will have prepared everything _____.
A. after the meeting began
B. as soon as the meeting will begin
C. by the time the meeting begins
D. when the meeting would begin Đáp án là: C. by the time the meeting begins </s> | [
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<s> Chọn đáp án đúng với câu hỏi: What does this text list?
A. rules for being safe while walking
B. the names of all pedestrians hit by cars last year
C. the names of the people working at the National Highway Traffic Safety Administration
D. the top five causes of accidental death among children Đáp án là: A. rules for being safe while walking </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một trong những điểm khác biệt của công cuộc cải tổ ở Liên Xô (1985 – 1991) so với công cuộc cải cách – mở cửa ở Trung Quốc (từ 1978) là gì?
A. Tiến hành cải tổ khi đất nước lâm vào tình trạng khủng hoảng trầm trọng.
B. Duy trì, củng cố và nâng cao vai trò lãnh đạo của Đảng Cộng sản.
C. Xóa bỏ chế độ một đảng, thực hiện đa nguyên chính trị, đa đảng đối lập.
D. Lấy phát triển kinh tế làm trọng tâm, mở rộng hội nhập quốc tế. Đáp án là: C. Xóa bỏ chế độ một đảng, thực hiện đa nguyên chính trị, đa đảng đối lập. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nung hỗn hợp gồm 15,2 gam Cr 2 O 3 và m gam Al. Sau phản ứng hoàn toàn, được 23,3 gam hỗn h ợ p rắn X. Cho toàn bộ X phản ứng với axit HC1 dư thoát ra V lít H 2 (đktc). Giá trị của V là:
A. 4,48.
B. 11,2.
C. 7,84.
D. 10,08. Đáp án là: C. 7,84. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kết quả phân tích đa thức thành nhân tử của x(x – 3) + 4(3 – x) là
A. (x – 4)(x – 3)
B. (4 – x)(x – 3)
C. (x – 4)(3 – x)
D. (4 + x)(x – 3) Đáp án là: A. (x – 4)(x – 3) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một loài thú, cho con đực mắt trắng, đuôi dài giao phối với con cái mắt đỏ, đuôi ngắn (P), thu được F 1 có 100% con mắt đỏ, đuôi ngắn. Cho F 1 giao phối với nhau, thu được F 2 có: 50% cá thể cái mắt đỏ, đuôi ngắn; 21% cá thể đực mắt đỏ, đuôi ngắn; 21% cá thể đực mắt trắng, đuôi dài; 4% cá thể đực mắt trắng, đuôi ngắn; 4% cá thể đực mắt đỏ, đuôi dài. Biết mỗi cặp tính trạng do một cặp gen quy định và không xảy ra đột biến. Theo lí thuyết, có bao nhiêu phát biểu sau đây đúng? I. Đời F 2 có 8 loại kiểu gen. II. Quá trình giảm phân của cơ thể cái đã xảy ra hoán vị gen với tần số 16%. III. Lấy ngẫu nhiên 1 cá thể cái ở F 2, xác suất thu được cá thể thuần chủng là 20%. IV. Nếu cho cá thể cái F 1 lai phân tích thì sẽ thu được Fa có các cá thể đực mắt đỏ, đuôi dài chiếm 4%.
A. 3
B. 1
C. 2
D. 4 Đáp án là: A. 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The sun slid behind the purple mountains in the ______ distance.
A. far
B. remote
C. isolated
D. far-flung Đáp án là: A. far </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tứ diện ABCD có AB⊥CD, AB = CD = 6,.là điểm thuộc cạnh BC sao cho MC = xBC (0 < x < 1) Mặt phẳng (P) song song với AB và CD lần lượt cắt BC, AC, AD, BD tại M, N, P, Q. Diện tích lớn nhất của tứ giác MNPQ là:
A. 9
B. 6
C. 10
D. 12 Đáp án là: A. 9 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các tập hợp:
A = {x ∈ Z | –1 ≤ x ≤ 2}; B = {x ∈ Z | –4 ≤ x ≤ 4}.
Xác định C_BA. Câu nào sau đây đúng?
A. C_BA = {–3; –2; 3; 4};
B. C_BA = {–4; –3; –2; 3};
C. C_BA = {–4; –3; –2; 3; 4};
D. C_BA = {–4; –3; –2; –1; 3; 4}. Đáp án là: C. C_BA = {–4; –3; –2; 3; 4}; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là thế mạnh nổi bật về ngành công nghiệp của Trung du và miền núi Bắc Bộ?
A. Thủy điện.
B. Khai khoáng.
C. Nhiệt điện.
D. Hóa chất. Đáp án là: D. Hóa chất </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về sự điều tiết của mắt, phát biểu nào sau đây là đúng?
A.Do có sự điều tiết, nên mắt có thể nhìn rõ được tất cả các vật nằm trước mắt
B.Khi quan sát các vật dịch chuyển ra xa mắt thì thể thuỷ tinh của mắt cong dần lên
C.Khi quan sát các vật dịch chuyển ra xa mắt thì thể thuỷ tinh của mắt xẹp dần xuống
D.Khi quan sát các vật dịch chuyển lại gần mắt thì thể thuỷ tinh của mắt xẹp dần xuống Đáp án là: C.Khi quan sát các vật dịch chuyển ra xa mắt thì thể thuỷ tinh của mắt xẹp dần xuống </s> | [
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<s> Chọn đáp án đúng với câu hỏi: David does not have _________ Peter does.
A. money more than
B. as many money as
C. more money as
D. as much money as Đáp án là: D. as much money as </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dung dịch H 2 SO 4 loãng phản ứng được với kim loại nào sau đây?
A. Ag
B. Cu
C. Fe
D. Au Đáp án là: C. Fe </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc đơn, quả nặng có khối lượng 40 g dao động nhỏ với chu kì 2s. Nếu gắn thêm một gia trọng có khối lượng 120 g thì con lắc sẽ dao động nhỏ với chu kì
A. 4s
B. 0,25s
C. 2 3 s
D. 2s Đáp án là: D. 2s </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: WTO là tên viết tắt của tổ chức nào sau đây?
A. thế giới.
B. Liên minh châu Âu.
C. Hiệp ước tự do thương mại Bắc Mĩ.
D. Diễn đàn hợp tác kinh tế châu Á – Thái Bình Dương. Đáp án là: A. thế giới. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Người ta thu khí oxi bằng cách đẩy nước là nhờ dựa vào tính chất
A. khí oxi tan trong nước ;
B. khí oxi khó hóa lỏng ;
C. khí oxi ít tan trong nước ;
D. khí oxi nhẹ hơn nước. Đáp án là: C. khí oxi ít tan trong nước ; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tài nguyên nào sau đây không thuộc tài nguyên thiên nhiên?
A. Tài nguyên rừng
B. Tài nguyên đất
C. Tài nguyên sinh vật
D. Tài nguyên trí tuệ con người Đáp án là: D. Tài nguyên trí tuệ con người </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nhiệt độ tăng thêm 10° thì tốc độ phản ứng tăng lên gấp 3 lần. Đ ể tốc độ phản ứng tăng lên 8 1 lần ( đang thực hiện ở 30° C) thì cần tiến hành ở nhiệt độ nào?
A. 90° C
B. 70° C
C. 15° C
D. 180° C Đáp án là: B. 70° C </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn hệ thức đúng được suy ra từ hệ thức cos^2 α + sin^2 α = 1 với 0° ≤ α ≤ 180°?
A. \[{\cos ^2}\frac{\alpha }{2} + {\sin ^2}\frac{\alpha }{2} = \frac{1}{2}\];
B. \[{\cos ^2}\frac{\alpha }{3} + {\sin ^2}\frac{\alpha }{3} = \frac{1}{3}\];
C. \[{\cos ^2}\frac{\alpha }{4} + {\sin ^2}\frac{\alpha }{4} = \frac{1}{4}\];
D. \[5\left( {{{\cos }^2}\frac{\alpha }{5} + {{\sin }^2}\frac{\alpha }{5}} \right) = 5\]. Đáp án là: D. \[5\left( {{{\cos }^2}\frac{\alpha }{5} + {{\sin }^2}\frac{\alpha }{5}} \right) = 5\] </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Liên kết trong phân tử KCl là liên kết nào?
A. Liên kết cộng hóa trị phân cực.
B. Liên kết kim loại.
C. Liên kết ion.
D. Liên kết cộng hóa trị không phân cực. Đáp án là: C. Liên kết ion. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chất nào dưới đây có khả năng tham gia phản ứng tráng gương?
A.CH 3 COOCH 3.
B.HCOOCH 3.
C.C 2 H 5 OH.
D.CH 3 COOH. Đáp án là: B.HCOOCH 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vùng giàu tài nguyên khoáng sản bậc nhất nước ta là
A. Trung du và mi ề n núi Bắc Bộ.
B. Đồng bằng sông Hồng
C. Bắc Trung Bộ
D. Tây Nguyên Đáp án là: A. Trung du và mi ề n núi Bắc Bộ. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Fill in the blank a suitable word Hello, My name............. Lan.
A. am
B. is
C. are
D. do Đáp án là: B. is </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn từ có trọng âm chính khác với các từ còn lại:
A. festival
B. badminton
C. participant
D. organize Đáp án là: C. participant </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho đoạn thẳng AB dài 50 cm, đoạn thẳng MN dài 15 dm. Tính tỉ số độ dài của đoạn thẳng AB và đoạn thẳng MN.
A. 50/15
B. 15/50
C. 1/3
D. 3 Đáp án là: C. 1/3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biểu hiện quan trọng nhất của sự xuất hiện chủ nghĩa đế quốc là
A. xuất hiện giai cấp tư sản và vô sản
B. sự ra đời của các tổ chức độc quyền
C. chiến tranh đế quốc nhằm phân chia thuộc địa
D. mâu thuẫn xã hội gay gắt Đáp án là: B. sự ra đời của các tổ chức độc quyền </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Những nhận biết về môi trường xung quanh giúp động vật hoang dã nhanh chóng tìm được thức ăn và tránh thú săn mồi là kiểu học tập?
A. In vết
B. Quen nhờn
C. Học ngầm
D. Điều kiện hóa Đáp án là: C. Học ngầm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điền các từ láy thích hợp vào chỗ trống Mưa xuống (...), giọt ngã, giọt bay, bụi nước tỏa trắng xóa. Trong nhà bỗng tối sầm, một mùi nồng (...), cái mùi xa lạ, man mác của những trận mưa mới đầu mùa. Mưa (...) trên sân gạch. Mưa (...) trên phiến nứa, đập (...) vào lòng lá chuối.
A. ngai ngái - rào rào - đồm độp - bùng bùng – sầm sập
B. sầm sập - ngai ngái - rào rào - đồm độp - bùng bùng
C. đồm độp - bùng bùng - ngai ngái - rào rào - sầm sập
D. rào rào - đồm độp - bùng bùng - sầm sập - ngai ngái Đáp án là: B. sầm sập - ngai ngái - rào rào - đồm độp - bùng bùng </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Kết quả đúng số chữ số có nghĩa của phép tính sau: 250 − 23, 1.0, 3451 + 0, 1034 − 4, 56
A. 237,57159.
B. 237.
C. 237,5.
D. 237,57. Đáp án là: B. 237. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong giảm phân, sự tự nhân đôi của NST xảy ra ở
A. Kì trung gian của lần phân bào I
B. Kì giữa của lần phân bào I
C. Kì trung gian của lần phân bào II
D. Kì giữa của lần phân bào II Đáp án là: A. Kì trung gian của lần phân bào I </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: The word "they'’ in the last paragraph refers to ____.
A. nouns
B. people
C. speakers
D. Americans Đáp án là: A. nouns </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong không gian Oxyz, cho các điểm A(0;−2;−1),B(1;−1;2). Tìm điểm M trên đoạn thẳng AB sao cho MA = 2MB.
A. (1/2;(−3)/2;1/2)
B. (2;0;5)
C. (2/3;(−4)/3;1)
D. (-1;-3;-4). Đáp án là: C. (2/3;(−4)/3;1) </s> | [
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1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm x biết (3/4x-3/5)-1/2=0
A. x=2/15
B. x=22/15
C. Không tồn tại x
D. x=22/15;x=2/15 Đáp án là: D. x=22/15;x=2/15 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Some interesting (26)............. have been done in libraries.
A. survey
B. questionnaires
C. research
D. studies Đáp án là: D. studies </s> | [
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2... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong không gian với hệ tọa độ Oxyz, cho đường thẳng (d):(x+2)/1=(y−2)/(−1)=(z+3)/2 và điểm A(1;-2;3).Mặt phẳng qua A và vuông góc với đường thẳng (d) có phương trình là:
A. x−y+2z−9=0.
B.x−y+2z+9=0.
C.x−2y+3z−9=0.
D.x−2y+3z−14=0. Đáp án là: A. x−y+2z−9=0. </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đẳng thức nào sau đây đúng với x≤0?
A.√(4x^2)=2x
B.√(4x^2)=4x
C.√(4x^2)=−4x
D.√(4x^2)=−2x Đáp án là: D.√(4x^2)=−2x </s> | [
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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. Why is it that many teenagers have the energy to play computer games until late at night but can't find the energy to get out of bed (1) ________ for school? According to a new report, today's generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours' sleep a night, (4)_______teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours' sleep a night less than their parents did at their age. Điền vào số 5
A. jeopardy
B. threat
C. risk
D. danger Đáp án là: B. threat </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Để phân biệt ba dung dịch : dung dịch etanol, dung dịch glixerol và dung dịch phenol, ta lần lượt dùng các hóa chất sau đây?
A. Na, dung dịch B r 2
B. NaOH, Na
C. dung dịch B r 2, C u ( O H ) 2
D. dung dịch B r 2, N a Đáp án là: C. dung dịch B r 2, C u ( O H ) 2 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo gồm vật nhỏ có khối lượng 500 g gắn vào một lò xo có độ cứng 50 N/m. Con lắc này chịu tác dụng của ngoại lực cưỡng bức tuần hoàn. Khi tần số góc của ngoại lực lần lượt là 5 rad/s và 8 rad/s thì biên độ của dao động con lắc lần lượt là A 1 và A 2. Hãy so sánh A 1 và A 2.
A. A 1 = 2 A 2
B. A 1 > A 2
C. A 1 = A 2
D. A 1 < A 2 Đáp án là: D. A 1 < A 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các nguồn tài nguyên khoáng sản như than, dầu, khí là nguyên liệu cho ngành công nghiệp nào sau đây?
A. Công nghiệp luyện kim đen.
B. Công nghiệp luyện kim màu.
C. Công nghiệp năng lượng, hóa chất.
D. Công nghiệp vật liệu xây dựng. Đáp án là: C. Công nghiệp năng lượng, hóa chất. </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hãy chọn câu đúng nhất.
A. Số chia hết cho 3 là số có tổng các chữ số chia hết cho 3
B. Số chia hết cho 9 thì số đó chia hết cho 3
C. Cả A, B đều sai
D. Cả A, B đều đúng Đáp án là: D. Cả A, B đều đúng </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,
379,
30033,
29891,
521,
30975,
29876,
274,
30057,
29884,
29871,
30128... | [
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,
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1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Biện pháp nào dưới đây tốt nhất để hạn chế tác hại do lũ quét đối với tài sản và tính mạng của nhân dân?
A. Bảo vệ tốt rừng đầu nguồn.
B. Xây dựng các hồ chứa nước.
C. Di dân ở những vùng thường xuyên xảy ra lũ quét.
D. Quy hoạch lại các điểm dân cư ở vùng cao. Đáp án là: A. Bảo vệ tốt rừng đầu nguồn. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
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29884,
298,
228,
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29875,
29901,
350,
347,
31214,
31500,
29876,
1374,
29874,
30103,
29886,
1055,
30712... | [
1,
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1,
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different sound in the part underlined.
A. s i gn
B. l i ght
C. b i e
D. t i n Đáp án là: D. t i n </s> | [
1,
1,
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678,
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29871,
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29976,
29886,
29871,
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29901,
10987,
278,
1734,
607,
756,
263,
1422,
6047,
297,
278,
760,
1090,
... | [
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nội dung chính của đoạn trích sau: “ Hồn Trương Ba: (ngồi ôm đầu một hồi lâu rồi đứng vụt dậy) Không! Không! Tôi không muốn sống như thế này mãi! (nhìn chân tay, thân thể) Tôi chán cái chỗ ở không phải của tôi này lắm rồi, chán lắm rồi! Cái thân thể kềnh càng thô lỗ này, ta bắt đầu sợ mi, ta chỉ muốn rời xa mi tức khắc! Nếu cái hồn của ta có hình thù riêng nhỉ, để nó được tách ra khỏi cái xác này, dù chỉ một lát!. [...] Hồn Trương Ba bần thần nhập lại vào xác hàng thịt. Trên sân khấu, nhân vật Trương Ba biến đi. Chỉ còn lại xác hàng thịt mang hồn Trương Ba ngồi lặng lẽ bên chõng...Vợ Trương Ba vào”.
A. Cuộc đối thoại giữa Hồn Trương Ba và xác hàng thịt
B. Cuộc đối thoại giữa Hồn Trương Ba và những người thân trong gia đình
C. Cuộc đối thoại giữa Hồn Trương Ba với Đế Thích
D. Quyết định cuối cùng của Hồn Trương Ba Đáp án là: A. Cuộc đối thoại giữa Hồn Trương Ba và xác hàng thịt </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,
1939,
31214,
31500,
29875,
270,
686,
18558,
30103,
29876,
29882,
2723... | [
1,
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1,
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1,
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1,
1,
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1,
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1,
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1,
1,
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1,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: 21% của 2014 là:
A. 422,49
B. 422,94
C. 42,29
D. 42,92 Đáp án là: B. 422,94 </s> | [
1,
1,
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678,
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29976,
29886,
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29875,
29901,
29871,
29906,
29896,
29995,
274,
31556,
29874,
29871,
29906,
29900,
2... | [
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... |
<s> Chọn đáp án đúng với câu hỏi: Ngày 1/1/1959 diễn ra sự kiện gì trong lịch sử Cu – ba?
A. Ba – ti – xta đảo chính, thiết lập chế độ độc tài quân sự ở Cu – ba.
B. Cuộc tấn công vào pháo đài Môn – ca – đa của 135 thanh niên yêu nước.
C. Chế độ độc tài Ba – ti – xta bị lật đổ, nước cộng hòa Cu – ba được thành lập.
D. Quân dân Cu – ba đánh bại đội quân đánh thuê của Mĩ ở bãi biển Hi – rôn. Đáp án là: C. Chế độ độc tài Ba – ti – xta bị lật đổ, nước cộng hòa Cu – ba được thành lập. </s> | [
1,
1,
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678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
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30128,
30030,
865,
325,
31280,
29875,
274,
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29884,
298,
228,
190,
146,
29875,
29901,
405,
3249,
30712,
29891,
29871,
29896,
29914,
29896,
29914,
29896,
29... | [
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: There is no alternative. The president must approve the bill if the Congress passes it
A. possible agreement
B. improvement
C. other choice
D. change Đáp án là: C. other choice </s> | [
1,
1,
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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,
298,
228,
190,
146,
29875,
29901,
1670,
338,
694,
8671,
29889,
450,
6673,
1818,
2134,
345,
278,
11118... | [
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: As stated in paragraph 2, a large percentage of e-waste meant for recycling in the developed countries _________.
A. is enventually sent to developing nations
B. is later recycled in local factories
C. contains all valuable metals except gold
D. is buried deep in the soil at landfills Đáp án là: A. is enventually sent to developing nations </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
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30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
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29875,
29901,
1094,
8703,
297,
14880,
29871,
29906,
29892,
263,
2919,
19649,
310,
... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Dầu mỏ, nguồn tài nguyên quan trọng của Tây Nam Á tập trung chủ yếu ở khu vực nào dưới đây?
A. Ven biển Đen.
B. Ven Địa Trung Hải.
C. Ven biển Caxpi.
D. Ven vịnh Péc-xích. Đáp án là: D. Ven vịnh Péc-xích </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
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29901,
7266,
31500,
30712,
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2730,
207,
140,
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302,
2543,
29877,
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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: Đặc điểm nào sau đây không đúng với thị trường chung châu Âu?
A. Các nước EU có chung một chính sách thương mại buôn bán với ngoài khối.
B. Quyền tự do đi lại, cư trú, chọn nghề của mọi công dân được đảm bảo.
C. Công dân nước nào thì chỉ được mở tài khoản thanh toán tại một ngân hàng ở nước đó.
D. Sản phẩm của một nước được tự do buôn bán trong toàn thị trường chung. Đáp án là: C. Công dân nước nào thì chỉ được mở tài khoản thanh toán tại một ngân hàng ở nước đó. </s> | [
1,
1,
29871,
678,
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30128,
29976,
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29875,
29901,
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30250,
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31214,
207,
137,
29883,
29871,
30128,
347,
31500... | [
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho dãy các kim loại: Fe, Zn, Al, Mg, Ag, Cu. Số lượng kim loại vừa phản ứng được với dung dịch NaHSO 4, vừa phản ứng được với dung dịch HNO 3 đặc, nguội là
A. 3
B. 4.
C. 2.
D. 5. Đáp án là: C. 2. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
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298,
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190,
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29875,
29901,
14542,
1146,
30478,
29891,
5777,
30103,
29883,
413,
326,
658,
29874,
... | [
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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... |
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