请大神帮忙写一段英语的作文
题目
请大神帮忙写一段英语的作文
Do you think people's psychology plays an essential role in economic decision-making?
答案
In my opinion,I think people's psychology plays an essential role in economic decision-making.The psychology effects on people's behavior.Economic decision related to the society as a whole.
不知道写什么了.中文都不知道能说什么.要不你说个中文?
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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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