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问题 选择题

下列物质中属于纯净物的是（　　）

A．液氧

B．空气

C．啤酒

D．石油

答案

A、液氧是氧气的液态，只有氧气一种物质组成，属于纯净物，故A正确；

B、空气中含有氧气、氮气、二氧化碳等属于混合物，故B错；

C、啤酒中含有乙醇和水还有其他添加剂，属于混合物，故C错；

D、石油中含有汽油、柴油、润滑油等属于混合物，故D错．

故选A．

听力题

动词填空（10分）

1.Listen! The music _______(sound)nice!

2.The next morning John ________(tell) us another story about himself.

3.You __________(not miss) the hospital if you walk along the road.

4.How long does it take you ________(ride) to school every morning?

5.Jim, with his friends ________(fly) kites in the park every Sunday.

6.There ________(be) two fashion shows next week, aren’t there?

7.Keep quiet! Our parents ________(plan) a trip to Hangzhou.

8.I hope you ________(take) notes carefully at tomorrow’s meeting.

9.We’re looking forward to _________(win) the football match.

10._________(get) to the zoo, turn left  when you come to the crossroads.
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多项选择题

氯胺酮对产妇的作用有哪些（）。

A.无抑制新生儿作用

B.催产

C.镇痛

D.增加子宫张力

E.增加子宫收缩力
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