问题 单项选择题 A1/A2型题

符合t检验条件的数值变量资料如果采用秩和检验,不拒绝H时()

A.第一类错误增大

B.第二类错误增大

C.第一类错误减少

D.第二类错误减少

E.F检验

答案

参考答案:B

解析:本题考点:参数检验与非参数检验的区别。当资料符合参数检验条件时,非参数检验效能要比参数检验低,发现总体差异的能力不如参数检验高,容易把一些本来有差别的总体检验成同一总体。

阅读理解

阅读理解

     What is your favorite color? Do you like yellow, orange, and red? If you do, you must be an

optimist(乐观者), a leader, an active person who enjoys life, people and excitement. Do you prefer

grays and blues? Then you are probably quiet, shy and you would rather follow than lead. If you love

green, you are strong-minded and determined. You wish to succeed and want other people to see

you are successful. At least this is what psychologists tell us, and they should know, because they have

been seriously studying the meaning of color preference(爱好), and the effect that colors have on human

beings. They tell us that we don't choose our favorite color as we grow up. If you happen to love brown,

you did so as soon as you opened your eyes, or at least as soon as you could see clearly.

      A yellow room makes us feel more cheerful and more comfortable than a dark green one, and a red

dress rings warmth and cheer to the saddest winter day. On the other hand, black is depressing(压抑).

Light and bright colors make people not only happier but more active. It is a fact that factory workers

work better, harder, and have fewer accidents when their machines are painted orange rather than black

or dark gray.

     Remember, then, that if you feel low, you can always brighten your day or your life with a new shirt

or a few colorful things. Remember also that you will know your friends and your enemies better when

you find out what colors they like and dislike. And don't forget that anyone can guess a lot about your

character when you choose a piece of handkerchief.

1. According to this passage,            .

A. one can choose his color preference

B. one is born with his color preference

C. one's color preference is changeable

D. one has to choose his favorite color as soon as he can see clearly

2. The main idea of this passage is            .

A. one's color preference shows one's character

B. you can brighten your life with wonderful colors

C. psychologists have been studying the meaning of color preference

D. one's color preference has something to do with his character and colors have effects on human beings

3. The writer believes that in realizing the four modernizations of country, we need more

     people who love           .

A. yellow

B. red

C. green

D. black

单项选择题