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【单选题】
三点检验时,要求品评人员( )之间,如果实验目的检验两种产品是否相似时人数则为( )
A.
10-20 ，20-30
B.
10-20 ，30-40
C.
20-40 ，50-100
D.
20-40 ，30-50
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