单项选择题
调查某地100人的收缩压=140mmHg,s=10mmHg,该地95%的人收缩压的范围是()
A.139.8~140.2
B.120.4~159.6
C.125.0~154.6
D.138.0~141.9
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单项选择题
A.139.8~140.2
B.120.4~159.6
C.125.0~154.6
D.138.0~141.9
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