急需英文演讲稿 try not to become a man of success,but rather,a man of value
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急需英文演讲稿 try not to become a man of success,but rather,a man of value
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If you鈥檝e never hear this phrase before,I hope that seeing it now will ignite a fire inside your mind to really think about what is most important in life and also in business.If you have read this ...
举一反三
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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