问题 填空题

水力警铃应安装在公共通道或值班室附近的外墙上,且应安装检修、测试用的阀门。水力警铃和报警阀的连接应采用镀锌钢管,当镀锌钢管的公称直径为15mm时,其长度不应大于();当镀锌钢管的公称直径为20mm时,其长度不应大于();安装后的水力警铃启动压力不应小于()。

答案

参考答案:6m;20m;0.05MPa

阅读理解

Peter's uncle lived in the country. Once Peter went to stay with him for a few weeks. When they went for a walk or for a drive in the car and they passed somebody ,his uncle waved. Peter was surprised and said, “Uncle George, you know everybody here. Where did you meet them all?”

“I don't know all these people,” said his uncle                

“Then why do you wave to them?” asked Peter.                 

“Well, Peter,” answered his uncle, “when I wave to someone and he knows me, he is happy. He goes on his journey with a happier heart. But when I wave to some one and he doesn't know me, he is surprised and says to himself, ‘Who is that man? Why did he wave to me?’ So he has something to think about during the rest of his journey, and that makes his journey seem shorter. So I make everyone happy.

小题1:Peter was surprised that his uncle _______

A.waved to everybody they passed

B.knew everybody there

C.said hello to everyone

D.didn't know all the people they passed小题2:“I don't know all these people” means ________.

A.I know none of these people

B.I know some of these people

C.I don't know any of these people

D.I know most of these people小题3:When Uncle George waved to his friends, they became ________.

A.worried

B.happy

C.sad

D.surprised小题4:Some people didn't know Uncle George. When he waved to them, they ________.

A.became angry with him

B.thought that he must be a friend

C.thought why he was waving to them

D.didn't look at him小题5:Uncle George waved to everyone so that ________.

A.he could make some more friends

B.he could surprise everyone

C.everyone would remember him

D.he would make everyone happy

选择题