问题 单项选择题

医疗用品污染后的危害程度可分为几类()

A.1类

B.3类

C.5类

D.7类

E.9类

答案

参考答案:B

解析:医用物品对人体的危险性是指物品污染后造成危害的程度,根据其危害程度将其分为3类。

填空题
完形填空
完形填空。
                                                              James's New Bicycle
      James shook his money box again. Nothing! He carefully   1   the coins that lay on the bed.$24. 52 was
all that he had. The bicycle he wanted was at least$90!   2   on earth was he going to get the   3   of the
money?
      He knew that his friends all had bicycles. It was   4   to hang around with people when you were the only
one without wheels. He thought about what he could do. There was no   5   asking his parents, for he knew t
hey had no money to   6 
     There was only one way to get money, and that was to   7   it. He would have to find a job.   8   who
would hire him and what could he do? He decided to ask Mr. Clay for advice, who usually had   9   on most
things.
      "Well, you can start right here," said Mr. Clay. "My windows need cleaning and my car needs washing." 
      That was the  10  of James' s odd-job (零工) business. For three months he worked every day after
finishing his homework. He was amazed by the variety (多样化) of  11  that people found for him to do. He
took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the  12  of cars
he washed and windows he cleaned, but the  13  increased and he knew that he would soon have  14  for the
bicycle he longed for.
      The day  15  came when James counted his money and found$94. 32. He  16  no time and went down
to the shop to pick up the bicycle he wanted. He rode  17  home, looking forward to showing his new bicycle
to his friends. It had been hard  18  for the money, but James knew that he valued his bicycle far more  19  he
had bought it with his own money. He had  20  what he thought was impossible, and that was worth even
more than the bicycle.
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