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问题 单项选择题

眼镜蛇冲击镐每工作（），应检查冲击机构油位，把机器垂直放置，机器直立时，加油孔即是油位，不足添加SAE15W/40柴机油。

A.2小时

B.4小时

C.6小时

D.8小时

答案

参考答案：B

解答题

把90-（45×2）里的括号去掉，运算顺序不变______．
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填空题

根据首字母和汉语提示填入恰当的单词。

1. "Show me your d____ license." "Here you are."

2. The boy is so s____ that he falls asleep in class.

3. It's a very difficult dream to a .

4. Sbe tried to stop smoking, and she s____.

5. What a great e____ Yang Liwei had!

6. Girl students in our school shouldn't be allowed to get their ears ____ (刺穿).

7. She is a ____ (成员) of a tennis club.

8. Anyone can see the ____ (重要) of good health.

9. We have plenty of ____ (本地的) stores to choose from.

10. The girl's got her ears pierced, but she doesn't wear ____ (耳环).

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