求翻译 This is to certify that above mentioned commodities were produced and manufactured in the DP
题目
求翻译 This is to certify that above mentioned commodities were produced and manufactured in the DP
答案
兹证明以上所提及到的产品都是生产于DP.
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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