here are some surefire ways to make sure you are ready physically,spiritually to take those exams.
题目
here are some surefire ways to make sure you are ready physically,spiritually to take those exams.
答案
这里有一些完全方法能够让你身心都能为考试准备好
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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