在统计学上的统计量是指（）。
A.总体均数
B.描述总体特征的指标
C.描述样本特征的指标
D.描述人群特征的指标
E.描述变量特征的指标
参考答案：C
Not until ___ on TV ___ that the Chinese was rescued by the European Union Task Force.
A．did I turn; did I know
B．did I turn; I knew
C．I turned; did I know
D．I turned; I had know
机械图幅最大的是（）号图纸。
A.5
B.3
C.1
D.0
