题目内容
these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
A. initially B. conventionally
C. superbly D. randomly
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题目内容
these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
A. initially B. conventionally
C. superbly D. randomly