从mydream或ilove.中任选一个题目写一篇英语作文200字
题目
从mydream或ilove.中任选一个题目写一篇英语作文200字
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My dream home is very big and clean.It has at least five floors and fifteen rooms.On the ground floor,there is a kitchen,a dining room and a bathroom.There are no other rooms on the ground floor.My be...
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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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