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【单选题】
决策过程中的“拍板”是指( )。A.
确定决策目标
B.
确定价值指标
C.
方案优选
D.
方案实施
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A.
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A.
did not change
B.
has not changed
C.
was not changed
D.
had not changed
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A.
worked
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【单选题】研究新药A治疗胃病疗效,在某医院选择40 例胃病患者,随机分成实验组和对照组,实验组用药 A,对照组用公认有效的药B。这种对照在实验设计中称为( )
A.
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B.
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C.
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D.
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