英语题 填空选择
题目
英语题 填空选择
1 .i want to join the student --------(change) programs.
2 .yesterday he watched a ----------(move) tv program.
3 .this hotel aims to provide first-class services ---- guests.
A. to B. for C. with D. on
4 .nowadays quite a few graduates ---------(volunteer) to teach in the countryside
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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