试题与答案

某高校测得1100名20岁健康男大学生的身高,经检验资料服从正态分布,其均值为172

题型:单项选择题

题目:

某高校测得1100名20岁健康男大学生的身高,经检验资料服从正态分布,其均值为172cm,标准差为.4cm,求得的区间(172-2.58×4,172+2.58×4)称为身高的()

A.99%医学参考值范围

B.95%医学参考值范围

C.99%总体均数可信区间

D.95%总体均数可信区间

E.以上都不是

答案:

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参考答案:A解析:此题的解题关键在于,要充分的理解“政治权力型经济”的含义,顾名思义所谓的政治权力型经济指的就是国家利用行政手段来知道经济的发展,所给的选项中①盐铁官营制度和④重农抑商政策都属于国家...

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题型:阅读理解

In almost every big university(大学)in the United States, football is a favourite sport. American football is different. Players sometimes kick the ball, but they also throw the ball and run with it. They try to take it to the other end of the field. They have four chances(机会)to move the ball ten yards(码). They can carry it or they can throw it. If they move the ball ten yards, they can try to move it another ten yards. If they move it to the end of the field, they receive six points.

It is difficult to move the ball. Eleven men on the other team try to stop the man with the ball. If he does not move the ball ten yards, his team kicks the ball the other team.

Each university wants its own team to win. Many thousands of people come to watch. They all shout for their favourite team.

Young men and women come on the field to help the people shout more. They dance and jump while they shout.

Each team plays ten or eleven games each season.

The season begins in September and ends in November. If a team is very good, it may play another game after the season ends. The best teams play again on January 1, the first day of the New Year. Many people go to see these games and many others watch them on TV.

小题1:In American football players can_____.

A.only kick the ball

B.only throw the ball

C.only carry the ball

D.kick, throw and carry the ball小题2:Which is the best title for the passage?

A.American Football

B.Most People Like Football

C.Many People Enjoy Watching Football Games

D.American Football Is Not Like Soccer

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