试题与答案

阅读理解。 John was ten years old and he was

题型:阅读理解

题目:

阅读理解。

      John was ten years old and he was very lazy. He had to go to school, of

course, but he was bored there and tried to do as little work as possible. His father and mother were

both doctors and they hoped that he would become one, too, when he grew up. But one day John

said to his mother, "When I finish school, I want to become a garbage collector."

     "A garbage collector?" his mother asked .She was very surprised. "That's not

a pleasant job. Why do you want to become a garbage collector?"

     "Because then I'd only have to work one day a week," John answered.

     "Only one day a week?" his mother said, "What do you mean?"

     "Well," John answered, "I know that the ones who come to our house only

work on Wednesday, because I only saw them on that day."

1. John_____at school.

A. didn't do any work

B. did much work

C. did very little work  

D. tried to finish his work   

2. John's parents wanted him to become______.    

A. a garbage collector  

B. a doctor

C. a teacher          

D. a worker  

3. John hoped to be a garbage collector because______.    

A. he knew it was an important and necessary job

B. he thought he would work only one day a week

C. he often saw some garbage collectors come to his house

D. the garbage collectors really work only one day a week 

4. John thought that the garbage collectors only work one day a week because ______.

A. it was a rule              

B. some garbage collectors told him so

C. his parents told him so      

D. he saw them work only on Wednesday

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:[要点解析] 对于流媒体应用,通常一个新的分组比老的分组更加重要,因此采用的拥塞控制策略是牛奶(Milk)策略;而对于文件传输,一个老的分组比新的分组更有价值,因此采用的拥塞控制策略是葡萄...

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②I2+2Na2S2O3→Na2S4O6+2NaI

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