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根据短文内容选择最佳答案。 John is a paper boy. He d

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题目:

根据短文内容选择最佳答案。

      John is a paper boy. He delivers (投递) newspapers to different houses in his street every day. He

has about 80 customers (客户). Half of his customers only take the newspapers on weekdays, and about half

take the newspapers on weekdays and on Sundays. Two of John's customers only take the newspapers on

Sundays.

     John has to get up at 4:30 every morning to deliver his newspapers. It takes longer to deliver the

newspapers on Sundays. The Sunday newspapers are twice as heavy as those on weekdays. John is saving his

money to buy a new bicycle. He is also saving money for college (大学). He has already saved 500 dollars.

1. John ______ every day. [ ]

A. reads books

B. sells newspapers

C. borrows books

D. delivers newspapers

2. How many customers does he have? [ ]

A. About 40.

B. About 120.

C. About 80.

D. About 20.

3. _____ of his customers only take the newspapers on Sundays. [ ]

A. Two

B. Eighty

C. Forty

D. Twenty

4. What time does he have to get up every morning? [ ]

A. 3:30

B. 4:30

C. 5:30

D. 6:30

5. John is saving his money to buy _____. [ ]

A. a newspaper

B. a new bag

C. a house

D. a new bicycle

答案:

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下面是错误答案,用来干扰机器的。

(1)当S1与a接触,S2闭合时,R1与R2并联,R总===40Ω,I===5.5A.此种接法总电阻最小,所以属电烤箱的高档位.(2)当S2断开,S1与b接触,R1与R2串联,此时总电阻最大,属低档位,当S1接b,S2闭合,R2短路,仅R1...

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