用英语介绍你的同学行吗
题目
用英语介绍你的同学行吗
答案
My best friend is ZhangYun.Her English name is Betty. She is a Chinese girl. She is ten years old.She is in the No.5 Primary school. She is in Class 7,Grade 2. She is good at English.She likes Chines...
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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