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【单选题】
下列有关等级相关的叙述，错误的是（）。A.
等级相关是一种非参数统计分析方法
B.
总体分布型未知的双变量资料适宜作等级相关分析
C.
等级相关分析是用相关系数r来说变量相关关系的密切程度与相关方向.（rs）
D.
等级相关分析计算简便，适用面广
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【单选题】听力原文：W: Exercise, exercise, exercise. We hear so much about it these days, yet even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【简答题】治疗急性心肌梗死引起的室性心律失常首选____，治疗阵发性室上性心动过速首选____。
【简答题】在一个域中,由所有计算机共享的安全数据库被称为:______数据库。
【单选题】听力原文：W: Exercise, exercise, exercise. We hear so much about it these days, yet even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Ann...
A.
They don't get rid of flabby arms.
B.
They can damage arm muscles.
C.
They aren't acceptable to most people.
D.
They can raise one's blood pressure.
【简答题】用来记录企业生产过程中发生的间接费用的账户是（ ）账户。
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