问题 单项选择题

2009年某大型煤矿发生了一起重大事故,事发现场的人有以下的断定:
矿工甲:发生事故的原因是设备问题;
矿工乙:有人违反了操作规程,但发生事故的原因不是设备问题;
矿工丙:发生事故的原因是设备问题,则有人违反了操作规程;
矿工丁:发生事故的原因是设备问题,但没有人违反操作规程。
如果上述四人的断定中只有一个人为真,则以下可能为真的一项是( )。

A.矿工甲的断定为真
B.矿工乙的断定为真
C.矿工丁的断定为真
D.矿工丙的断定为真,有人违反了操作规程

答案

参考答案:B

解析: 由于只有一个人为真,而A、C、D均基于同一前提,不可能全为真,故只有B为真,符合题意。此题还可采用假设法:假设矿工甲为真,因为在四人的判定中只有一个人为真,则矿工丙和丁都为真,则矿工甲不可能为真。以此类推,只有矿工乙的判定为真才符合题意,故正确答案为B项。

阅读理解

Once there was a little orphan (孤儿) who always wished that he could fly like a bird. It was very difficult for him to understand why he could not fly.

There was another little boy who was crippled. One day the orphan came to a park, where he saw the little crippled boy playing in the sand alone.

He ran over to the little crippled boy and asked him if he had ever wanted to fly like a bird.

“No,” he said. “But I’ve been thinking about what it would be like to walk and run like others.”

“That is very sad,” said the little orphan. “Do you think we could be friends?”

“Sure,” said the little crippled boy.

The two little boys played for hours. Neither of them felt as lonely as they had been before. Then the little crippled boy’s father came with a wheelchair to pick up his son. The little orphan ran over to him and said something into his ear.

“That would be OK,” said the man.

The little orphan ran back to his friend and said, “You are my only friend and I wish I could do something to make you walk and run like others. Unluckily, I can’t. But there is something that I can do for you.”

The little orphan boy turned around and told his friend to slide onto his back. Then he began to run across the grass. He ran faster and faster, carrying the little crippled boy on his back.

The father began to cry with tears as his son shouted at the top of his voice, “I’m FLYING! Daddy, I’m FLYING!”

小题1:The underlined word “crippled” in the second paragraph means ______.

A.having no arms

B.not being able to walk

C.not being able to fly

D.not being able to see小题2: What did the little orphan most probably say to the crippled boy’s father?

A.May I carry him on my back for a run?

B.Could you be my daddy, too?

C.Would you join us in our game?

D.Could I be friends with your son?小题3:Why did the little crippled boy’s father cry?

A.Because the orphan boy became his son’s only friend.

B.Because his son was able to fly.

C.Because he was happy to see his son’s excitement.

D.Because the orphan boy was riding on his son’s back.

填空题