but over the past few mouth she is not done so well.and she has troubleputting her heart in her
题目
but over the past few mouth she is not done so well.and she has troubleputting her heart in her
接上homework
答案
但是过去的几年里她表现的并不好,她没有将心思放在学业上.
题目中的is 应该是has
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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