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题目选项分析

A two-year study beginning in 1977 found that, among 85-year-old people, those whose immune systems were weakest were twice as likely to die within two years as others in the study. The cause of their deaths, however, was more often heart disease, against which the immune system does not protect, than cancer or infections, which are attacked by the immune system.

Which of the following, if true, would offer the best prospects for explaining deaths in which weakness of the immune system, though present, played no causal role?

【选项】The majority of those in the study with the strongest immune systems died from infection or cancer by 1987.

选项是否正确?

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:OG19-语文分册-156
  • 题目来源2:OG20-语文分册-167
正确率:52%