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题目选项分析

Scientists have determined that an effective way to lower cholesterol is to eat three servings of whole grains every day. Studies have shown that the cholesterol levels of people who did so were significantly lower after six months than were those of people who did not, even though the cholesterol levels of the two groups had been the same before the studies began. Clearly, eating whole grains can have an appreciable effect on cholesterol levels.

The answer to which of the following questions, if true, would be most useful in evaluating the claim about whole grains above?

【选项】 Were the two groups of people in the study involved in the same exercise program?

选项是否正确?

答对用户笔记

oolongchaxx
0人
oolongchaxx 2018-09-03 02:18:50
当时在这个选项和选项D之间犹豫过 以为题目的陷阱在于时间 所以选了beyond 6 months 但是exercise是一个没有说明是否控制了的变量 所以应该选B

题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:Manhattan-77
难度:中等
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