军队职称英语真题汇编-C阅读理解63

试卷预览

• 1Why can bacteria only be seen under a microscope（　）。

  A.Because they are sopowerful

  B.Because they are sotiny

  C.Because they move sofast

  D.Because they grow soquickly

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• 2Why is the heating and cooking done（　）。

  A.To ft food into the can

  B.To keep food longer

  C.To keep bacteria from getting into the cans

  D.To kill the bacteria already in the food

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• 3How do bacteria multiply（　）。

  A.Very rapidly

  B.Insidethe sealed can

  C.Very slowly

  D.In a matter of years

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• 4What are the changes the bacteria make in food（　）。

  A.Cooling

  B.Heating

  C.Ruining

  D.Burning

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• 5For what purpose is food canned（　）。

  A.To improve it

  B.To cook it

  C.To preserve it for a period of time

  D.To make sure the bacteria will multiply

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