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Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.

Which of the following, if true, most seriously weakens the argument?

【选项】Drug-company researchers experimenting with a nasal spray based on zinc have found that it has much the same effect on colds as the gel does.

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:PREP08 Test 1-109
正确率:45%