如何把He is going to visit his teacher next week改为否定句
题目
如何把He is going to visit his teacher next week改为否定句
答案
He is not going to visit his teacher until next week
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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