九年级body language课文
题目
九年级body language课文
急,没带英语书回家,在线等
答案
body language Debbie and Simon have part-time jobs at a travel agency.It is Saturday morning and they are sitting in the office. Debbie and Simon looked up as a well-dressed lady entered.The lady gl...
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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