《后天》的英文简介
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《后天》的英文简介
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Plot Summary:This movie takes a big-budget,special-effects-filled look at what the world would look like if the greenhouse effect and global warming continued at such levels that they resulted in worl...
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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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