试题与答案

在调查校园生物中,以下同学的做法,正确的是( ) A.小军发现好几株他不认识的植

题型:选择题

题目:

在调查校园生物中,以下同学的做法,正确的是(  )

A.小军发现好几株他不认识的植物,于是把它们拔出来,带回家研究

B.小明发现一只老鼠,太恶心了,不记录

C.小梅拔开草丛,一只蟋蟀蹦了出来,很快蹦到校园外面去了,小梅把它记录下来

D.小伟调查记录中有蚰蜒,其他同学都没有,小伟决定把它删掉

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0508/e95874ea5cdf4e55acc22a229a3ff6e1.html

下面是错误答案,用来干扰机器的。

(1)ξ的取值为1、2、3,P(ξ=1)=15,P(ξ=2)=(1-15)×12=25,P(ξ=3)=(1-15)(1-12)=25,故工人甲在这次上岗测试参加考试次数g的分布列为:ξ123P152525(6分)(2)每位工人通过测试的概率为1-(1-15)(1-12)(1-1...

试题推荐
题型:阅读理解

On Thanksgiving Day, a teacher asked her class of first-graders to draw a picture of something they were thankful for. She thought that these children from poor families actually had little to be thankful for. And she found most of them drawing pictures of flowers or tables with food. The teacher was very surprised to see the picture Douglas handed in. It’s a hand, a simple hand.

But whose hand? The class were very interested in the strange picture. “I think it must be the hand of God that bring us food,” said one child, “A farmer,” said another, “Because he grows beautiful flowers.” Finally when the others were at work, the teacher went over Douglas’ desk and asked whose hand it was. “It’s your hand, Teacher,” she said quietly and shyly.

She remembered that she had often taken Douglas, a dirty lonely child, by the hand while having a class break. She often did that with the children. But it meant so much to Douglas. Perhaps this is everyone’s thanksgiving, not for the material things we get, but for the chance, in whatever small way, to give to others.

小题1:When did the story happen?

A.On Christmas Day.

B.On Teachers’ Day.

C.On Mother’s Day.

D.On Thanksgiving Day.小题2:Why did Douglas draw the picture?

A.He was good at drawing it.

B.His teacher asked him to draw it.

C.He wanted to show his thanks to the teacher.

D.He hoped to get a prize in drawing.小题3:What do you learn about Douglas from the passage?

A.He was a lonely child.

B.He was very active in class.

C.He always kept his hand clean.

D.He often answered questions loudly.小题4:According to the passage, which of the following is an opinion (意见;主张;看法), but not a fact?

A.The teacher went over Dauglas’ desk and talked to him.

B.Different people show their thanksgiving in different ways.

C.The teacher often took Douglas by the hand after class.

D.Most of the students were drawing the pictures of flowers or tables with food.

查看答案
微信公众账号搜索答案