there are forty student in the class.half of them are form the south,and ()twentyare from the north
题目
there are forty student in the class.half of them are form the south,and ()twentyare from the north
A:the otherB:the others C:the rest D:others
答案
A
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
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