英语作文我宠物狗
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英语作文我宠物狗
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I have a lovely dog.Its name is YoYo.I like it very much.It has two big ears,two big and bright eyes.Its hair is brown.It has come to my home for a year.It has become a part of my family.It has its ow...
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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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