问题 单项选择题

某热力管道,其材料为碳素钢,埋设中遇到直埋电缆,有一处穿越河流的下水管道,并且该区域曾经敷设地下燃气管道。

燃气管道的阀门安装前应做( )试验,不渗漏为合格,不合格者不得安装。

A.强度

B.耐腐蚀

C.气密性

D.材质

答案

参考答案:C

阅读理解

Reading comprehension.

     Stephen Hawking was born in Oxford, England, in 1942. He went to school in St Albans. After leaving

school, Hawking went first to Oxford University where he studied physics, then he went on studying in

Cambridge University. As he himself admits (承认), he didn't work hard. He was a lazy student, and did

very little work. However, he still got good marks.

     At the age of 20, he first noticed something was wrong with him. His mother was very worried and

took him to see a doctor. He was sent to hospital for tests. He had an incurable (不可治愈的) illness. And

the doctor said he would die before he was 23.

     At first, he became very sad and disappointed (失望的). After coming out of the hospital, he suddenly

realized that life was beautiful. Later he married, found a job and had three children. He also went on with

some of the most important scientific research.

     Today, Hawking still works at Cambridge University as a professor. He strongly believes that his story

shows that nobody, however bad their situation is, should lose hope. "Life is not fair," he once said, "You

just have to do the best you can in your own situation."

Judge the following sentences true (T) or false (F) according to the passage.

( )1. As a university student, Stephen Hawking worked very hard.

( )2. Stephen Hawking first noticed something was wrong with him when he was 23.

( )3. Hawking changed his life attitude (态度) after he had come out of the hospital.

( )4. There were three people in Hawking's family.

( )5. From the passage, we know that we shouldn't lose hope in our bad situation.

填空题