英语作文,关于国庆节,holiday”
题目
英语作文,关于国庆节,holiday”
答案
National Day is coming,and we can have a seven-day.My family are going to Hainan.It's a good seaside city.We are staying there for a week.We are going to the beach and going swimming in the sea.We're ...
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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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