What do medical researchers usually use to make placebo pills? The placebo pills can ______.

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问题 What do medical researchers usually use to make placebo pills?
The placebo pills can ______.

选项 A、ease pain
B、stop pain
C、cure a doctor
D、cure disease

答案D

解析 A,B并不错,但只是placebo pills的部分功能,只是一个例子。因此,更好的选择应是D。
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