The salesman retired young because

试卷相关题目

• 1The word“detected”in paragraph 3 could be best replaced by

  A.cured．

  B.removed．

  C.discovered

  D.caused

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• 2People buy cell phones for the following reasons EXCEPT that

  A.they’re popular．

  B.they’re useful．

  C.they’re cheap．

  D.they’re convenient．

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• 3Which of the following best expresses the main idea of this passage、

  A.An antigen is any substance that triggers an immune response．

  B.One of the immune system’s primary functions is the allergic response．

  C.The human body is an appropriate habitat for microbes．

  D.The basic function of the immune system is to distinguish between self and nonself

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• 4Which of the following statements is true、

  A.Allergens are usually harmful substances．

  B.Antigens can trigger an immune response．

  C.People with antigens do not suffer from obvious responses．

  D.There is no difference between an antigen and an allergen．

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• 5How do the immune cells recognize an antigen as“foreign”or“nonself”、

  A.Through an allergic response．

  B.Through blood type．

  C.Through characteristic shapes on the antigen surface．

  D.Through fine hairs protruding from the antigen surface．

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• 6On the safety issue of mobile phones，the manufacturing companies

  A.deny the existence of mobile phone radiation．

  B.develop new technology to reduce mobile phone radiation．

  C.try to prove that mobile phones are not harmful to health．

  D.hold that the amount of radiation is too small to worry about．

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• 7The writer’s purpose of writing this article is to advise people

  A.to buy mobile phones．

  B.to use mobile phones less often．

  C.to update regular phones．

  D.to stop using mobile phones．

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• 8Antimicrobial resistance has become a global public health issue because

  A.new antibiotics are too expensive for poor countries．

  B.infections caused by multi—drug resistant bacteria have killed a lot of people．

  C.scientists know nothing about multi-drug resistant bacteria．

  D.there may be few or no treatment to infections caused by multi-drug resistant bacteria．

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• 9The word“prudent’’in paragraph I is closest in meaning to

  A.unwise

  B.careful

  C.wasteful

  D.widespread

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• 10The article published in The Lancet Infectious Diseases found that

  A.a new multi—drug resistant bacterium has appeared．

  B.some bacteria have developed a new gene to resist almost all antibiotics．

  C.some infections are caused by antibiotics．

  D.some countries are successful in controlling multi—trug resistant microorganisms．

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