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【单选题】
对某个高速路段驶过的120辆汽车的车速进行测量后发现，平均车速是85公里／小时，标准差是4公里／小时，下列哪个车速可以看作异常值( )。A.
78公里／小时
B.
82公里／小时
C.
91公里／小时
D.
98公里／小时
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hoping to
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A.
that
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it
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which
【单选题】用一只标准表校验一只电压表,当标准表的电压值为220V时,电压表的示数为220.5V,则被测表的绝对误差为( )伏
A.
-0.5V
B.
0.5V
C.
-1
D.
1
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