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题目内容
下列各组数可以作为权数的是( )
A.0.1,0.3,0.5,0.2
B.0.2,0.3,0.25,0.3
C.
1
5
,
2
5
,
2
5
,
1
5
D.0.15,0.25,0.35,0.25