题目内容

设f(x)=x/x-1,则当x≠0时且x≠1时,f[1/f(x)]=()。

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氢气瓶为确保通风良好,宜露天存放。

简述简单随机取样。

(英译中)Yet it was a manly face, serious and intelligent, and Chu (朱德) judged him to be in his middle twenties.

领导活动可能产生各种各样的结果,因此领导效能包含正效能与负效能。()

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