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单项选择题
A、Men are far more inclined to ruminate about the stressors and disappointments they encounter.
B、All ruminations are abnormal.
C、Over-thinkers go over and over what happened in future.
D、Both the brain and experience are the factors in overthinking.
单项选择题
A、height
B、weight
C、head circumference
D、teeth growth
在甲乙两个变量数列中, 若甲数列标准差<乙数列标准差σ2, 则两个变量数列平均数代表性相比较()
A. 甲数列的平均数代表性高于乙数列
B. 两个数列的平均数代表性相同
C. 乙数列的平均数代表性高于甲数列
D. 不能确定