问题 单项选择题

大口井入孔应采用密封的盖板,盖板顶高出地面不得小于( )。

A.0.25m
B.0.5m
C.0.7m
D.1.5m

答案

参考答案:B

解析:为了防止雨水和地面污水的直接污染,要求大口井入孔应采用密封的盖板,盖板顶高出地面不得小于0.5m;且井口周围应设不透水的散水坡,其宽度一般为1.5m;在渗透土壤中,散水坡下面还应填厚度不小于1.5m的黏土层,或采用其他等效的防渗措施。

阅读理解

阅读理解。

      David did well in his other subjects except physics. Mr. Brown, his physics teacher, gave him his

physics paper and said to him, "Show it to your dad and ask him to sign his name On the paper." 

      David played football until it was 7 o'clock. When he got home,his parents finished supper. His dad

was watching TV and his mom was doing the dishes in the kitchen as usual. 

     "Dad, may I ask you some questions?" David asked happily. "Yes,of course," said his dad. "If you

can't answer them, you'll have to do something for me." "OK, I'll do as you tell me." said his dad. "What

is cooler, walking or sitting in the sun?" "Walking is cooler. It can make wind." "Which clothes can keep

out the sunlight, shirts or coats?" "Coats can keep out the sunlight because they are much thicker than

shirts." 

     "Is a man smart if he wears a coat and walks in the sun in summer?" David looked at his dad and

waited for his answer. His dad thought for a minute and shook his head. 

      David took out his paper, "Now sign your name on my paper, please."

根据短文内容,回答下列问题。

1.What does Mr. Brown teach at school?

      __________________________________________

2.Who usually washes the dishes at David's house?

      __________________________________________

3.Was David's father watching TV when he got home?

      __________________________________________

4.What do you think David's father has to do finally?

      __________________________________________

5.What do you think of David?

      __________________________________________

选择题