简述马基雅维利的政治统治术的内容并作评论。

表示血清学滴度平均水平的指标是

A．算术均数
B．几何均数
C．中位数
D．全距
E．百分位数

六、完成句子

1. Don’t ________ ________ _______ (瞧不起) a person only because he has failed in an exam.

2. He’s giving her French lessons _____ _______ _______(交换) her teaching him Chinese.

3. We must ______ our attention _______ efficiency(集中).

4. They were wet to the skin because they _____ ______ ______(遇上) a shower on the way.

5. He has got a big room so he is not too ______ ______(贫穷).

6. Which driver was ______ _______ (负责) for the accident?

7. The picture ______ ______ _______(使我想起) my childhood.

8. They set up a monument ____ ________ _______(纪念) the soldiers who died in the Anti-Japanese War.

治疗急性心肌梗死引起的室性心动过速的首选药是（）

A.奎尼丁

B.普鲁卡因胺

C.普萘洛尔

D.利多卡因

E.维拉帕米

隔离开关电动操作机构中的接触器自保持回路（）防误闭锁。

A.必须经过

B.可以经过，也可以不经过

C.不经过