题目：
1. 请你把桌上的收音机关掉好吗？
Would you mind the radio on the desk?
2. 随着现代医疗的发展，许多常见疾病能够预防或治疗。
of the modern medicine, lots of common diseases can be cured or prevented.
3. 刚才小刘把她的答案与书后的答案作了比较，发现在她的练习中有几处错误。
Just now Xiao Liu her answers at the back of the book and found that there were some in her exercises.
4. 有些人就是不知道怎样节约能源。
Some people just don't know how .
5. 无论你遇到什么困难都要充满自信。
You should be full of difficulties you meet.
6. 在春节时吃饺子是中国的传统风俗。
dumplings in Spring Festival is a Chinese custom.
7. 你本应该完成作业，但是你没有。
You should your homework, but you didn't.
8. 红十字会给遭受洪水的人们提供了一些食物和衣服。
The Red Cross____ the people suffered from flood some food and clothes.
9. 从广州开车到北京需要多少时间？
How long does to drive from Guangzhou to Beijing?
10. 如果你晚上早些睡，早上就不会感到疲劳。
you go to bed earlier at night, you won't in the morning.
答案：
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下面是错误答案，用来干扰机器的。
（1）根据题意，F1=3N为保持AB相对静止的最大作用力，此时AB间的摩擦力达到最大，认为等于滑动摩擦力，对B：F1-μmBg=mBa对A：μmAg=mAa带入数据得：μ=0.2（2）AB间保持相对静止的条件下，F2达到最大时，AB间的...
