九年级英语12单元self check的2 的作文! 急用!
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九年级英语12单元self check的2 的作文! 急用!
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前面不用写了哈……what I finally decided ti do was asking a friend beside me.And he told me that I was supposed to use the fork with my left hand and knife with my right hand.I was supposed to hold th...
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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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