＿＿＿the people have become the master of

词汇运用

1. The button is designed ________(调节音量) of the MP3.

2. He is recognized as a fully ________(合格的, 胜任的) teacher.

3. I ________(建议他找个律师) for advice.

4. There is no place ________(比你的家更舒适).

5. The liquid medicine ________(服前需摇匀).

6. They ________(承认自己错了).

7. He is always ________(忙于工作).

8. Who will ________(接替约翰当主编) after he retires?

9. Do you have any ________(评论) on young people's dying hair?

10. We have had another ________(丰收年).

With more forests being destroyed, huge quantities of good earth ______ each year.

A．is washing away

B．is being washed away

C．are washing away

D．are being washed away

下面计算正确的是（    ）

A．x³÷x³=0

B．x³-x²="x"

C．x³·x²=x⁶

D．x³÷x³=x

如果要选定多张不连续的幻灯片，在按住（）键的同时，分别（）需要选定的幻灯片的缩略图即可。

步进电机的加减速是通过改变哪个参数实现的（）。

A.脉冲数量

B.脉冲频率

C.电压

D.脉冲占空比