A.47.5% B.45.0% C.90.0% D.95.0% E.50.0% ~+1.96s范围内的变量值有

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问题 A.47.5% B.45.0%
C.90.0% D.95.0%
E.50.0%
+1.96s范围内的变量值有

选项 A、 
B、 
C、 
D、 
E、 

答案A

解析
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