外研版英语八年级下module8 unit2原文
题目
外研版英语八年级下module8 unit2原文
如题,我需要外研版英语八年级下module8 unit2课文原文,要全篇,谢谢
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People all over the world celebrate the new year. However, not all countries celebrate in the same way, and in some countries, the new year doesn't begin on the same date every year. It can depend on ...
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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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