已知函数 1 1 sin x f x x x ,记 0 lim x a f x , (I) 求 a 的值 (II) 若 x 0 时, f x a 与 k x 是同阶无穷小,求常数 k 的值 .
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一些所谓的“明星”实际上称不上真正的明星,他们并不具有无愧于受大众崇拜的艺术成就、文化素养以及个人品格。上述议论可得出以下所有结论,除了:
The great use of school education is not so much to teach you things _____ to teach you the art of learning.
He doesn't know what to say, for it is the first time that he ______ with a girl.