在市场抽样调查方法中，( )是群体间差异愈小，群体内差异愈大时，抽样统计精度愈高。

阅读短文，选择正确答案。

     One of my favourite memories as a child is going by the river and sitting freely on the bank. There I would

enjoy the peace and quiet, watch the water rush down and hear the sound of falling leaves.

     When I think about the bamboo tree's ability to return to its original position, the word "resilience" comes to

mind. When used to describe a person, this word means the ability to become well again from shock,

disappointment or any other situation that makes somebody unhappy.

     Have you ever felt you are about to break with a sudden noise? Have you ever felt you are at your breaking

point? Thankfully, you are lucky to have the experience to live to talk about it.

     Life is a mixture of good times and bad times, happy moments and unhappy moments. Next time you are

experiencing one of those bad times or unhappy moments that take you close to your breaking point, don't break.

Try your best not to let the situation get the best of (占上风) you. 

     Hopes will take you through the unpleasant experience. With hopes for a better tomorrow or a better

situation, things may not be as bad as they seem to be. The unpleasant experience may be easier to deal with if

the end result is worth having.

     If you are at your breaking point, you should be like the bamboo tree, bend, but don't break!

1. The writer was moved by _______ one day when he went to sit by the river. [ ]

A. the water

B. the bamboo tree

C. the leaves

2. What does the underlined word "resilience" mean? It means _______. [ ]

A. 恢复力

B. 兴奋

C. 忧伤

3. What did the writer use to do when he was young? [ ]

A. He used to go to the park to hear the sound of falling leaves.

B. He used to go to the lake and watch the water.

C. He used to go by the river and sit on the bank.

4. Next time you experience one of those bad things, try your best ______ get the best of you. [ ]

A. to let the situation

B. not to let the situation

C. to change the situation to

5. What can we learn from the passage? [ ]

A. We should bend when we hear a sudden noise.

B. We should go by the river and sit freely on the bank.

C. We should have the ability to become well again.

把3个白球和7个红球放在一个盒子里，让你每次从中任意摸出1个球，然后放回．照这样摸20次，摸出红球的次数大约占总次数的______．

某1年期零息债券的年收益率为18.2%，假设债务人违约后回收率为20%，若1年期的无风险年收益率为4%，则根据KPMG风险中性定价模型得到上述债券在1年内的违约概率为（）。

A.0.05

B.0.10

C.0.15

D.0.20

使用链霉素过量应选择哪一种措施促使其排泄（）

A、用碱性利尿药，如醋酸钾

B、用强利尿药，如呋塞米（速尿）

C、应用依他尼酸（利尿酸）

D、用茶碱利尿

E、采用酸化尿的措施

甲某为某公司的经理，2003年1月1日，该公司被宣告破产，经查，甲某对该公司的破产负有个人责任，公司在2003年5月1日破产清算完结。2006年12月1日，甲某进行上市公司收购活动。甲某的做法符合规定。( )