The number of prematurely stopped clinical trials has increased recently. Participants in the trials were happy when they were

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问题 The number of prematurely stopped clinical trials has increased recently.
Participants in the trials were happy when they were stopped early.

选项 A、Right
B、Wrong
C、Not mentioned

答案C

解析 短文并没有提及当这些实验研究被提前停止时实验对象是否感到高兴。
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