阅读理解。
A young man went to a town and worked there. He did not have a wife and a servant did the
work in his house.
The young man liked laughing a lot. He nailed the servant's shoes to the floor on Monday, and
then laughed, because he put his feet in them and fell down.
The servant was not angry, but smiled. Then the young man put brushes in his bed on Tuesday.
The servant got into bed and hit the brushes with his feet. He was afraid. The young man laughed
loudly again. Again the servant was not angry, but smiled.
Then on Wednesday the young man said to his servant, "You're a nice, kind man. I am not going
to be unkind to you again."
The servant smiled and said, "And I'm not going to put any more mud from the street in your coffee."
1. The young man went to a town ___.
A. to study
B. to work
C. to see his relative
D. to spend his holiday
2. He played a joke on the servant because ___.
A. he hated him
B. he was not satisfied with the food the servant prepared for him
C. he wanted to get pleasure
D. he liked to show off himself
3. When the young man played a joke on him, the servant was not angry but smiled because ___.
A. he liked the young man' s action
B. making the young man laugh is his job
C. he was afraid to be fired
D. he thought he shouldn't be angry with a child
4. What did the servant do in return to the young man?
A. He stole something from the house.
B. He gave a smile to the young man.
C. He had a fight with him.
D. He put mud into the young man's coffee.
5. Why did the young man stop playing jokes on the servant?
A. Because the servant showed kind and nice behaviour to him
B. Because the servant told him the truth
C. Because he wanted to be a good man
D. Because his father tol
d him to do so
的悬浮颗粒物），其主要来源为燃煤、机动车尾气等。因此，对PM2.5、SO2、NOx等进行研究具有重要意义。
2NO(g) △H
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