暑假英语日记大概60词 各位大神帮帮忙
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暑假英语日记大概60词 各位大神帮帮忙
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Art exhibitionToday,It's very interesting,I went to the art exhibition with my brother.In the art exhibition,I saw many portraitS,they are very interesting.My favorite one is the painting the sky,It's...
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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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