teach a foreigner to learn Chinese
题目
teach a foreigner to learn Chinese
I wonder if there are some foreigners who want to learn Chinese in Yantai.I want to do part time job,for one thing to practice my oral English,for another to earn some money during my spare time.
答案
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．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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