急需以《校园文明从我做起》为主题英语演讲稿,
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急需以《校园文明从我做起》为主题英语演讲稿,
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A meaningful Activity Our school has now started an activity called “Build Civilized Classes and a Harmonious Campus.” The topic is “ Get Rid of Bad Habits and Greet Civilization”.Bad habits do ...
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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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