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Số lượng câu hỏi
6
Số lượng câu trả lời
15
Điểm GP
0
Điểm SP
1
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Chủ đề:
Violympic toán 7Câu hỏi:
(Mệnh đề nào đúng, mệnh đề nào sai)
Câu 5: Nylon-6,6 một loại polymer tổng hợp, được sử dụng phổ biến trong các ngành công nghiệp khác nhau, bởi các đặc tính đặc biệt và phạm vi ứng dụng rộng rãi của nó. Nó được xem là một trong những loại nhựa kỹ thuật được sử dụng phổ biến nhất. Nylon-6,6 là một polymer được tổng hợp từ adipic acid và và hexamethylenediamine.
a. Nylon-6,6 được tổng hợp bằng phương pháp trùng ngưng.
b. Trong một mắt xích của nylon-6,6, nguyên tố carbon chiếm 31,86% về khối lượng.
c. Nylon-6,6 thuộc loại poliamide bền với nhiệt nhưng kém bền trong môi trường acid hoặc base.
d. Vải nylon-6,6 có thể giặt chung với xà phòng có độ kiềm cao.
Câu trả lời:
1. You had trouble at school because you didn’t do your homework.(using IF)
=> If you had done your homework, you wouldn't have had trouble at school
2. Mel doesn’t ask her teacher so he doesn’t answer her questions. (inversion of IF_clause)
=> If Mel asked her teacher, he would answer her questions
3. they do not listen carefully so they can’t hear the woodpecker. (inversion of IF_clause)
=> If they listened carefully, they could hear the woodpecker.
4. If I had lain down on the sofa, I would have fallen asleep.
(inversion of IF_clause)
=> Unless I had lain down on the sofa, I would not have fallen asleep
5. If you gave the young boy this stick, he’d hurt himself. (inversion of IF_clause)
=> Unless you gave the young boy this stick, he’d not hurt himself.
6. The students didn’t solve the problem because they didn’t use their textbooks. (using IF)
=> If the students had used their textbooks, they would have solved the problem
7. He doesn’t wash his feet more often so his girlfriend doesn’t visit him more often. (inversion of IF_clause)
=> If he washed his feet more often, his girlfriend would visit him more often
III. RELATIVE CLAUSE 1. The house has been built in the forest. It doesn’t have electricity. (Using WHO/ WHOM/ WHICH) ____ The house which doesn't have electricity has been built in the forest
_________________________________________________________
2. Do you know the man? He is coming towards us. (Reduction of relative clause) _____ Do you know the man who is coming towards us?
________________________________________________________
3. I sent my parents some postcards. They were not so expensive. (Using WHO/ WHOM/ WHICH) ____ I sent my parents some postcards which were not so expensive
_________________________________________________________
4. I come from a city. The city is located by the sea. (Reduction of relative clause)
_______ I come from the city which is located by the
sea______________________________________________________
5. The soup was so delicious. I had it for lunch. (Reduction of relative clause) __________ The soup was so delicious which I had for lunch___________________________________________________
6. The first student has to clean the board. He comes to class (Reduction of relative clause) ____ The first student who comes to class has to clean the board_________________________________________________________ 7. The only room was Mary’s. It was painted yesterday (Reduction of relative clause) _________ The only room painted yesterday was Mary's____________________________________________________
8. She is talking about that author . His book is one of the best-sellers this year. (Using WHO/ WHOM/ WHICH) _______ She is talking about the author whose book is one of the best-sellers this year______________________________________________________
9. He bought all the books . They are needed for the next exam. (Using WHO/ WHOM/ WHICH)
__________ He bought all the books that are needed for the next exam___________________________________________________
10. Those children are taught well. Their parents are famous teachers (Using WHO/ WHOM/ WHICH) ______ The children, whose parents are famous teachers, are taught well_______________________________________________________ 11. Do you know the boy? we met him at the party last week? (Using WHO/ WHOM/ WHICH) ___________ Do you know the boy whom we met at the party last week?__________________________________________________
12. Was Neil Armstrong the first person? He set foot on the moon (Reduction of relative clause) _______ Was Neil Armstrong the first person to set foot on the moon?______________________________________________________