急求英语作文《A lucky day》60字左右!重赏!
题目
急求英语作文《A lucky day》60字左右!重赏!
答案
I really wanted to go and see Toy Story 3 but never saved up enough money for the ticket.Today my friend Xiao Ming passed on one ticket to me because he needed more time to finish his homework.So I th...
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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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