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问题 单项选择题

调整阀凸轮每降0.1mm，均衡风缸减压量就增加（）。

A.20kpa

B.10kpa

C.7.3kpa

D.24kpa

答案

参考答案：C

改错题
短文改错。
      此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
     如有错误（每行只有一个错误），则按下列情况改正：
     此行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
     此行缺一个词；在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
     此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
     注意：原行没有错误的不要改。
Nowadays, paper still come from trees. Unfortunately, we use a
lot of paper every day. We must not waste paper and there will 
not be any trees leaving on Earth. No tree means no paper. We
need 17 trees make one ton of paper. We must start using less
paper now because it takes about 100 years of a tree to grow.
How can we save paper? Firstly, we can use both the sides 
of every sheet of paper. We can re-use envelope. We can choose
drinks in bottles instead of drinks on cardboard cartons. We can
use plastic cups and plates instead of paper one. We can also 
use handkerchiefs instead of paper tissues. We can use less paper
shopping bags and we can re - use these paper bags later as well.
1. _____
2. _____
3. _____ 
4. _____ 
5. _____
6. _____
7. _____
8. _____
9. _____
10. _____
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单项选择题

《煤矿安全规程》规定，提升装置必须装设（）项保险装置。

A.9

B.8

C.7
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