eWhen you meet a child looking for his mother in the mall,what ways can you think of to help him or
题目
eWhen you meet a child looking for his mother in the mall,what ways can you think of to help him or
答案
当你遇见一个孩子在商场寻找他的妈妈时,你认为用什么方法才能帮助他?或者.
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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