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标题: 求教一道填空题，谢谢！ [打印本页]

作者: ysm12345 时间: 2019-9-9 15:49
标题: 求教一道填空题，谢谢！

请问第二空为什么选E呢？

3. At one time researchers viewed the placebo effect as (i)_____,a statistical (ii)_____ faced by those attempting an objective evaluation ofthe efficacy of potentially legitimate therapies. That view has changed: the placebo effect istoday seen as an important part of the healing process.

A. a boon	D. increment
B. a touchstone	E. annoyance
C. an impediment	F. deviation

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