康复医学工作的主要内容包括______、______和康复治疗。
参考答案：康复预防 康复评定
已知函数f（x）=xlnx．
（I）求函数f（x）的单调递减区间；
（II）若f（x）≥-x2+ax-6在（0，+∞）上恒成立，求实数a的取值范围；
（III）过点A（-e-2，0）作函数y=f（x）图象的切线，求切线方程．
We have sent an order slip to all that we have reason to believe are interested in our books.
A．who are believed by us
B．with who we have reason to believe
C．who we have reason to believe
D．with whom we believe
