初中英语作文what will the world be like in the future?300字
题目
初中英语作文what will the world be like in the future?300字
答案
Well,I think the world will be increasingly changed.There will be no cars; all people have flight cars which can travel not just cities but also through the countries around the world.There will be no...
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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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