题目内容

18. You should learn to be _____________ (independence) of your parents

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19.We do not have the _________________ (free) to do just what we like.

20. I’ve never regretted the _______________ (decide).

英译汉（请把下面的段落翻译成汉语。）33. There are many interesting activities on campus. They are organized by different student clubs. If interested, you can join them. It’s a good way to improve communication skills, to make friends and to enjoy you hobbies.

一个干燥系统使用的是湿度为H，流量为L (kg绝干气/h)的空气（送风机入口处），则湿空气的质量流量为：（）。

A. L*H
B. L/H
C. L(1-H)
D. L(1+H)