随机变量X的分布(概率函数或密度函数)有几个重要的特征数,以下不属于这些特征数的是______。
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衡量企业全部资产使用效率的指标是( )
A. 流动资产周转率
B. 固定资产周转率
C. 总资产周转率
D. 应收账款周转率
She ______ be iii because I saw her playing tennis just now.
A. can't
B. couldn't
C. mustn't
D. may not
(As soon) as (we've finished) supper, (we'll all) go (to) downtown to see the Sound of Music.
As soon
B. we've finished
C. we'll all
D. to
【真题试题】(2007年单项选择第15题)人力资源管理的首要职能是( )。
A. 人才开发
B. 人才保持和激励
C. 人才收获
D. 人才评价与调整