In the last five years,I have changed a lot. I used to be a introvert,however,now I am outgoing.I
题目
In the last five years,I have changed a lot. I used to be a introvert,however,now I am outgoing.I
答案
在过去五年的时间里,我发生了很大的改变.以前我很内向,然而现在,我很外向了.
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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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