问题 单项选择题

某日16时10分,某厂维修班开始检修连接污油池的输油管线,16时20分钳工甲将带有底阀的输油管线放入污油池内,当时污油池内油的液面高度为50cm,上面浮有30cm厚的污油,在连接100cm高的法兰时,由于法兰无法对正而连接不上,班长乙去车间喊电焊工丙,17时10分电焊工丙带着电焊机到达现场,由于是油池附近作业,电焊工丙在现场准备好后,去车间办理动火票,17时20分,钳工甲见丙迟迟没有回来,快到下班时间,于是用电焊开始焊接,焊接3min左右,发生油气爆炸,爆炸将油池顶盖掀开,油池着火,钳工甲在油池附近死亡。
根据以上情形回答下列问题,1~3题为单选题,4~7题为多选题。

该起事故爆炸的直接原因是( )。

A.通风不良

B.照明强度太低

C.环境温度过高

D.违章操作

E.对异常危险物品处理错误

答案

参考答案:D

完形填空
完形填空。
     Once a man and his wife worked for a businessman. There was a big box in the businessman's living
room. The businessman pointed at the box and said, "There's only one thing you  1  do. Don't open the box."
After saying this, he  2  the living room.
     The woman said to her husband, "There  3  be something expensive in the box. Let's  4  it, shall we?"
Her husband said no to her.
     The woman didn't give up her  5  One day, she decided to find out what was  6  it. Her husband didn't
stop her. She opened the box and looked  7 . She found nothing in the box and tried hard to close it,  8  she
failed.
     That evening the businessman came home and found the box was  9  He was very angry and asked the
woman and her husband to leave his home.
     "But there was nothing in the box," the woman said. "We haven't taken anything  10 ." The businessman
shouted at them, "The box is not important. I cannot believe you. That's important!"
( )1. A. needn't
( )2. A. entered
( )3. A. must   
( )4. A. open   
( )5. A. work   
( )6. A. near   
( )7. A. inside 
( )8. A. so     
( )9. A. lost   
( )10. A. at all
B. wouldn't
B. left    
B. will    
B. close   
B. idea    
B. under   
B. outside 
B. and     
B. open    
B. at times
C. mustn't 
C. found   
C. used to 
C. clean   
C. box     
C. in      
C. up                               
C. but                 
C. empty   
C. at once 
单项选择题