静脉导管留置时间过长易发生感染，一般导管留置时间不宜超过 A．1天 B．2天 C．3

满足患病率=发病率×病程的条件是（）。

A.在相当长的时间内，发病率相当稳定

B.在相当长的时间内，病程稳定

C.在相当长的时间内，患病率相当稳定

D.在相当长的时间内，当地人口相当稳定

E.在相当长的时间内，发病率和病程都相当稳定

根据所给首字母及汉语提示完成下列单词。

1. S______ say that seventy-four different kinds of living things go extinct every day.

2. Help y_______ to some fruit, children.

3. Can you p______ it to me? I don't think you are right.

4. China is a country with a rather long h_______.

5. It's p_____ to jog in early morning.

6. The r_____ why so many people caught the disease is still not clear.

7. People and the other animals can't live w_______ air or water.

8. Water is a l______, but you can change it into solid.

9. Ms. Li always tries new teaching m _______ in her English class.

10. The shop sells f_________ like desks and chairs.

下列句子中“之”字的用法和其他三个不同的一项是[ ]

A．祗辱于奴隶人之手     

B．腰白玉之环     

C．当余之从师也     

D．每假借于藏书之家

保险营销员在推销新型产品时，应当明确告知客户此类产品的费用扣除情况，并提示购买此类产品的投资风险，这些新型产品不包括（）

A、分红保险

B、投资连接保险

C、万能保险

D、家庭财产保险

公民道德建设必须以什么为指导？