what is business?(English only..)
题目
what is business?(English only..)
答案
What is business?A business can be defined as an organization that provides goods and services to others who want or need them.When many people think of business careers,they often think of jobs in la...
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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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