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谈谈你是怎样理解化学是一把双刃剑的

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我国动物种类最多的是以下哪种（）

A. 哺乳动物
B. 鸟类
C. 爬行类
D. 鱼类

物种多样性是指地球上（）等生物种类的丰富程度。

A. 植物
B. 动物
C. 微生物
D. 空气

This section is to test your ability to understand short dialogues. There are 7 recorder dialogues in it. After each dialogue, there is a recorded question. Both the dialogues and questions will be spoken two times. When you hear a question,you should decide on the correct answer from the 4 choices marked A),B),C),and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.

A movie ticket.
B. A meeting room.
C. A fight.
D. A table.

This section is to test your ability to understand short dialogues. There are 7 recorder dialogues in it. After each dialogue, there is a recorded question. Both the dialogues and questions will be spoken two times. When you hear a question,you should decide on the correct answer from the 4 choices marked A),B),C),and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.

A. He has been promoted.
B. He has passed the road test.
C. He has got a job offer.
D. He has bought a new car.