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  3. The experiment was conducted in a The person who had tested healthy before the study

The experiment was conducted in a The person who had tested healthy before the study

admin2009-01-21  39
问题 The experiment was conducted in a
The person who had tested healthy before the study
选项 A、dropped out.
B、passed away.
C、was found to have cancer.
D、was found to remain healthy.
答案C
解析
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