A Busy Weekend I was very busy last weekend.I visited my gra ndparents Saturday morning.We cooked me
题目
A Busy Weekend I was very busy last weekend.I visited my gra ndparents Saturday morning.We cooked meal s together.In the evening,we watched TV.Sun day morning,I played sports with my friends.I bought a presents for my mother,too.In the aft ernoon,I washed my clothes and read many b ooks.It was a busy weekend意思
答案
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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