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问题 单项选择题

在一次英语测验中，有3个学生得了90分，有9个学生得了80分，4个学生得了0分，4个学生得了60分。则这20个学生的平均分是多少（算术平均数）（）

A．85分 

B．83.5分 

C．80分 

D．75.5分

答案

参考答案：D

填空题

根据短文内容用所给单词的正确形式填空。

     Erik was a fourteen-year-old boy. He thought he was a young man but his parents didn't think so. They told him, “When you begin to think about _____l_____(help)  others,  you’ll be a young man.

     One morning, his parents gave Erik some money to buy hamburgers at a

store. He saw an old man there. The man looked very______2_____(tire).

Erik went up to him and knew that the old man had lost his money and hadn't had________3_______ (something) for his breakfast. Erik took the old man to the nearest restaurant. But the man asked only a glass of water for sorry for him, so he asked _____4______ (he). Erik felt waiter to bring the man some bread and a cup of coffee. The old man was so hungry that he ate up all the

food very soom. After that, the man told Erik chat he____5____ (will) never forget his kindness. Erik was Very pleased when he heard the old man" say, " You are a very good young man. " To their surprise, the food was a present

because that  day was the birthday of the boss.

1._______ 2.________ 3.________ 4._________ 5._________
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单项选择题

我国中继HRDS的长度为（）km

A.50

B.420

C.6900
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