初一英语作文(自我介绍)
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初一英语作文(自我介绍)
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Good morning/afternoon teachers and classmates.I'm XXX.I am a girl of 13.My family including my father,mother and me.I like basketball best.In addition,I also like table tennis.My favorite food is car...
举一反三
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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