do you think happy marriage is the most important thing in your life
题目
do you think happy marriage is the most important thing in your life
答案
not really.Marriage is just a way to live a fulfilling life.people can change and happy marriage needs more than just a felling of love.Instead,it requires the mutual development of each other,which m...
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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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