According to Passage B,we know that the “air-free water” probably  means _______.

试卷相关题目

• 1According to Passage A,we can infer that _______ will be  used less for making kitchen tools.

  A.aluminium

  B.iron　

  C.steel　

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• 2_______ does not react with water.

  A.Steel

  B.Zinc

  C.Copper

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• 3According to Passage A,we know that _______is often used in cars,and_______ is often used in electrical equipment.

  A.steel;copper

  B.iron;zinc

  C.steel;iron

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• 4他买电脑已有一年了。

  A.He bought his computer for a year.　

  B.He has bought his computer for a year.

  C.He has had his computer for a year.

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• 5露茜来这儿五天了。

  A.Lucy has come here for five days.

  B.Lucy has been here for five days.

  C.Lucy has arrived here for five days.

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• 6Which one is not the reason why Mark has become interested in s cience、

  A.Science is easy to learn.

  B.Science teachers are exce l lent in the school.

  C.The science facilities are very goo

  D.

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• 7In the last 20 years,7_______scientists won the Nobel Prize.

  A.Chinese　

  B.American

  C.Canadian

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• 8When Mark’s par  ents know he’ll go to learn science,they are _______.

  A.happy

  B.astonished

  C.angry

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