Đáp án:
B. metan
Hợp chất hữu cơ nào sau đây không có khả năng tham gia phản ứng cộng ?
A: Etilen.
B: Metan.
C: Axetilen.
D: Benzen.
Nêu các sự kiên chính về cuộc đấu tranh xâm lược của triều đình Huế và nd ta đối với Pháp1873-1884
31. The car was so expensive that I didn't buy it. A. The car was too expensive for me to buy. B. The car was such expensive that I didn't buy it. C. The car was not so cheap that I couldn’t buy it. D. The car was cheap enough for me to buy. 32. The coffee is so strong that I really can’t drink it. A. It is such coffee strong that I really can’t drink it. B. The coffee is too strong for me can’t drink it. C. It is such strong coffee that I really can’t drink it. D. The coffee is too strong for me to drink it. 33. It is such a bad book that nobody reads it. A. This book is too bad that nobody reads it. B. This book is too bad for nobody to read. C. This book is so bad that nobody reads it. D. This book is so bad for anybody to read it. 34. The room was too dark for us to see anything. A. The room was so dark that we couldn’t see anything. B. It was such a dark room that we couldn’t see anything. C. The room was very dark for us to see anything. D. A & B 35. It was such a crazy story that nobody believed it. A. The story was too crazy to believe it. B. The story was too crazy to believe. C. The story was so crazy that nobody believed. D. The story was too crazy nobody believe it. 36. She danced so well that she won the prize. A. She danced well enough to win the prize. B. She didn’t dance well enough to win the prize. C. She danced too well to win the prize. D. It was such a good girl that she won the prize. 37. This song is simple enough for us to sing. A. This song is so simple that we can sing. B. This song is so simple that we can sing it. C. This song is so simple for us to sing. D. It is such a simple song that we can sing. 38. The dress is not big enough for her to wear. A. It is such a small dress that she can’t wear it. B. The dress is so small that she can’t wear it. C. The dress is too small for her to wear. D. All are correct 39. The cake was too hard for him to eat. A. The cake was so hard that for him to eat. B. It was such hard cake that he could not eat. C. The cake was so hard that he couldn’t eat it. D. The cake was so hard that he can’t eat it. 40. The bag was too heavy for him to carry. A. The bag wasn’t enough light for him to carry. B. The bag was so heavy that he couldn’t carry. C. It was such a heavy bag for him to carry. D. It was such a heavy bag that he couldn’t carry it. 41. The garden is too small to play football in. A. The garden is so small not to play football in. B. The garden is small enough to play football in. C. The garden isn’t big enough to play football in. D. The garden is such small that they can’t play football in. 42. It was such bad coffee that he couldn’t drink it. A. The coffee was not good enough for him to drink. B. The coffee was so bad that he couldn’t drink it. C. The coffee was too bad for him to drink. D. All are correct 43. He isn’t strong enough to carry this table. A. He isn’t too weak to carry this table. B. He is too strong to carry this table. C. He is too weak to carry this table. D. He isn’t enough strong to carry this table
Tìm số tự nhiên x biết 3^7x-11 = 135 (7x-11 đều là mũ của 3 nhé mn) Giúp em đi ah !!!!!!!!!!!!!!! Hứa vote, cảm ơn đầy đủ ah
Người ta ghi nhận có trường hợp xuất hiện tượng nam hoá ở phụ nữ khi già( biểu hiện một số đặc điểm sinh dục phụ của nam giới) Hiện tượng trên được giải thích như thế nào? Có thể sử dụng biện pháp như thế nào để ngăn chặn hiện tượng đó
câu 1.trọng lực là gì? cho biết phương chiều của TLượng câu 2.sao lò xo là 1 vật đàn hồi?nêu cách vật có tính đàn hồi câu 3.viết công thức liên hệ giữa KLượng và TLực câu 4.klượng riêng là gì?đơn vị đo klượng riêng?công thức tính khối lượng riêng?
II. Rewrite the sentences beginning as shown: 1. David went home before we arrived. When we …………………………………………………………………………….. After …………………………………………………………………………………. 2. We had snack then we had a look around the shops. After…………………………………………………………………………………… 3. The light failed the moment they began work. They had no sooner ……………………………………………………………………. No sooner………………………………………………………………………………. Hardly …………………………………………………………………………………. 4. We had never been so happy before. We were………………………………………………………………………………... 5. I went to the zoo last year and that was where I saw a real tiger for the first time. Before ………………………………………………………………………………….. 6. I like you didn’t go to the party yesterday. I’d rather you …………………………………………………………………………... 7. The man was poor so he could not afford accommodation. If ……………………………………………………………………………………….. 8. My teacher gave me a lot of homework. I wish…………………………………………………………………………………… 9. He didn’t obey with his parents. I’d rather he…………………………………………………………………………….. 10. She didn’t take that job in the city because his home was very far from there. If his home ……………………………………………………………………………. giúp mình với các bạn ơi
Một hồ nước yên lặng có khoảng cách từ mặt nước đến mặt bờ hồ là 0,6m. Trên bờ hồ có cắm thẳng đứng 1 cây cọc. Giả sử cây cọc có chiều cao dài AB=40cm(điểm B là đỉnh cọc). Coi mặt nước của hồ như mặt gương. a) Vẽ ảnh của câu cọc qua mặt hồ nước b)Tính khoảng cách từ đỉnh B của cây cọc đến ảnh của nó
20. Mr Brown drank so many wine that he became sick. 21. Would you be enough kind to help me with my work? 22. It was so a funny film that I burst out laughing. 23. George is not enough intelligent to pass this exam. 24. This shirt is so small for him to wear. 25. The novel was such interesting that I had read it all night . 26. The sun is so bright for us to look at directly. 27. The boy is so young to drive that lorry. 28. I don’t think she is enough old to enjoy this story. 29. The meeting was so length that many people had to leave before it ended. 30. The weather was so cold for us to go out.
Cho kim loại kẽm tác dụng với axit HCl dư thu được 11,2 lit H2 (đktc). Tính: a) Khối lượng kém đã phản ứng. b) Khối lượng HCl đã phản ứng. c) Khối lượng ZnCl2 tạo thành theo 2 cách.
49. Có thể loại bỏ tính cứng tạm thời của nước bằng cách đun sôi vì lí do nào sau đây? A. Nước sôi ở nhiệt độ cao (100oC, áp suất khí quyển) B. Khi đun sôi đã làm tăng độ tan của các chất kết tủa C. Khi đun sôi các chất khí hòa tan trong nước thoát ra
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