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问题 单项选择题

若两个滚动轴承间距为L，轴的线膨胀系数为a，轴在工作状态时与轴承体温差为△t，则轴在工作状态时相对于壳体的热膨胀为（）。

A、a*L/△t

B、a*L*△t

C、a*△t/L

答案

参考答案：B

填空题

单词拼写。

根据所给汉语提示用适当的单词完成句子。（每空只写一个单词）

1. Don't feel _______ (羞耻) that you have to try several times before you finally stop smoking.

2. These rules and regulations have been _______ (采用) by many major cities.

3. The _______ (实际) cost was much higher than we had expected.

4. Prices have risen _______ (平稳) during the past decade.

5. The government is considering a total _______ (禁令) on the sale of handguns.

6. The president finally handled the issue by _______ (加强) the relationships between the two countries.

7. The greenhouse effect gives the earth's surface the _______ (平均) temperature of 15℃.

8. Huge _______ (数量) of oil were spilling into the Gulf of Mexico last year.

9. Don't call me unless it's ______ (绝对) necessary.

10. Who can ________ (预测) what painting styles there will be in the future?

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单项选择题

药品检验报告书的表头栏目报告日期应填写（）。

A.检验完成的日期

B.业务管理室主任审签的日期

C.报告寄出的日期

D.授权签字人审定签发报告书的日期
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