阅读理解。
A man went to a fast-food restaurant to buy his lunch.
"Hi,"a waiter said. "May I help you?"
"I'd like a hamburger, large chips and a Coke,"the man said.
"Is that for here or to go?"the waiter asked.
"To go," the man said.
The waiter put the man's lunch in a bag. The man took out his money and paid for his lunch.
"Thank you," the waiter said. "Have a mce day. "
The man took the bag and walked to a park. He sat down and opened the bag. He was surprised.
There was no hamburger or chips; there was only money in the bag-two thousand
dollars! Where was the man's lunch? Why was the money in the bag?
The manager of the fast-food restaurant needed to go to the bank. He put two thousand
dollars in an envelope, He put it in a bag and put the bag down. The waiter gave the manager's
bag to the man by mistake. So the manager had a hamburger, chips and a coke, and the man had
two thousand dollars !
1. The man went to a restaurant to______.
A. buy his lunch
B. have a rest
C. sell drinks
D. cook food
2. The man wanted to have his lunch______.
A. in a hotel
B. in a shop
C. in a restaurant
D. in a park
3. When the man opened the bag, he found______in it.
A. food
B. drink
C. money
D. nothing
4. How much money was there in the man's bag?
A. $ 100.
B. $ 200.
C. $ 100.
D. $ 2,000.
5. ______ couldn't find his money.
A. The man
B. The manager
C. The waiter
D. Nobody
）
（2）
（3）
， 
x是粒子在磁场内轨迹的两端点的直线距离。
=
， 
，
=
（
均为正整数）
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