谁能给我1篇英语作文40左右今天就要,
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谁能给我1篇英语作文40左右今天就要,
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I usually get up at six a.m everyday.Then I have my breakfast at half past six.After that,I get all my things packed and go to school.I arrive at school usually at 7:15.Our classes begin at 8:00 .We a...
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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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