英语写作 介绍生日
题目
英语写作 介绍生日
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My 12th birthday I had a gread time during my 12th birthday,I will remember it forever! In China,12th birthday is very important in a person's life,so my parents prepared it very carefully. On the mor...
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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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