问题 问答题

李晓同学在探究“光对鼠妇生活的影响”时,其做法如下:

将1只刚捉到的鼠妇放到一边是湿土,另一边是于土的木盒中,用一块黑纸遮住湿土的一边,然后计时观察,共观察10次,结果如下表。(√表示存在)

由此,他得出鼠妇喜欢生活在无光的环境中的结论。

(1)你同意李晓的实验方案和结论吗?

(2)如果不同意,请指出他的方案和结论中存在的问题,并提出修改建议。

答案

(1)不同意 

(2)1只鼠妇,一侧干土,一侧湿土。应放10只鼠妇,两侧都放湿土。

阅读理解

阅读理解。

     Here is a story told an American general( * * ) who was a very important figure in the American

army during the First World War. Everybody in the Untied States knew him and many people wished

to have a picture or something of his in their homes. Soon after the war the general returned to

Washington. One day he went to a dentist(牙医) and had six teeth pulled out. A week later the general

heard that his teeth were being sold in curiosity shops(古玩店) at $ 5 each. On each of the teeth there

was a label(标签) with the name of the general and words, "Buy these teeth and show them to your

friends at home." The general got angry. He rushed to his office and ordered six officers to go around

the city and buy all his teeth. The officers went out and visited every curiosity shop in the capital. They

were away from the office all day. In the evening they returned and put on the table in front of the

general the teeth they had bought. They had collected 175 teeth.

1. The general's teeth were sold in ____.

A.  the museum        

B.  the special shops selling some rare and interesting things

C.   the department store  

D.   the hospital

2. In the evening, the officers went back with all the teeth which cost _____.    

A. $ 785  

B. $ 1, 050  

C. $ 157  

D. $ 875

3. The general felt ____ when he heard his teeth were sold.  

A. happy  

B. excited  

C. sad  

D. angry

4. There was the general's name on the label of each tooth. This shows that _____.

A. the general's name was known by most of the people in Washington

B. the shop-keeper wanted to have more customers buy the teeth

C. the shop-keeper tried to make the general more popular

D. Both A and C

5. The general ordered his men to____.

A. look for his teeth and buy all of them

B. arrest the dentist at once

C. make all the shops stop selling teeth

D. buy all the teeth in all the shops

选择题