30字英语作文带翻译
题目
30字英语作文带翻译
答案
English is my favourte subject because English is used widely in the world,especially in Yiwu,a city with so many foreigners.What's more,I like it because my English teacher is kind and friendly to me...
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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