问题 解答题

某中学为庆祝建党90周年举行唱“红歌”比赛,已知10位评委给某班的打分是:8,9,6,8,9,10,6,8,9,7.

(1)求这组数据的极差:

(2)求这组数据的众数;

(3)比赛规定:去掉一个最髙分和一个最低分,剩下分数的平均数作为该班的最后得分.求该班的最后得分.

答案

解:(1)最大值是:10,最小值是:6,

则极差是:10-6=4;

(2)出现次数最多的是:8和9都是3次,6出现2次,1和10出现1次,因而众数是8和9;

(3)平均分是:(8+9+8+9+6+8+9+7)=8.

阅读理解

阅读理解。

       Like to chew on pencils?  It's a bad habit that you really should put a stop to.

       On the other hand, schoolteachers may face a challenge that is how to improve their students'

  attention.

       A British design company have launched (发布) a new product, to help children concentrate at

  school - pre-chewed pencils. The wooden pencils are priced at ?1.50 for a pack of four. British design

  company Concentrate, who developed the product, say that pupils are less likely to put them in their

  mouths because thy have already been chewed. And they say this is a cheap but effective way of

  encouraging students to "get their teeth" into their lessons instead.

       The company, which says it designs products to help kids at school and make clear  why they get

  distracted or are unable to focus in class, claim (声称) the chewed end encourages them to get thinking

  right away.  

       "We know it's foolish but just get down to some concentrated thinking and who knows what might

  happen," said company boss Mark Champkins.

       "We began to look at the reasons that children might be distracted , uncomfortable or unable to

  concentrate in lessons- and we set about designing some simple, cost-effective (划算的) products to

  work out  some of the problems."

       That way, you even don't want to put your mouth anywhere near it.  At least, I don't think you'd have

  the stomach to, do you? 

1. What is the aim of the design company Concentrate?

A. Helping students "get their teeth" into their lessons  

B. Encouraging students chew the pencils

C. Helping students like to use the pencils                          

D. Helping students write homework clearly.

2. The underlined word "focus" might mean _____ in Chinese.

A. 分离的  

B. 聚精会神的  

C. 脱离的    

D. 思想不集中的

3. What did Mark Champkins think of the pre-chewed pencil?

A. He likes it very much because it helps students concentrate on their lessons.

B. It is helpful for students to focus in class but should be improved in some way.

C. Students wouldn't put the pencil anywhere near the mouth or stomach.

D. There is something wrong with the pencil., so he doesn't like it. 

4. Which of the following is true according to the passage?

A. It is designed by an American company.

B. The pencil has already been chewed.

C. It makes kids hate thinking right away.

D. It makes kids less likely to put it in the mouth.

5. In which page of a newspaper can you most probably read this passage?

A. Business  

B. Advertisement  

C. Science    

D. News

选择题