that is all right I am afraid I have no time是用that is all right 回答还是you are welcome
题目
that is all right I am afraid I have no time是用that is all right 回答还是you are welcome
是前者吧
答案
that is all right :没关系 当然是用that is all right 回答啦 you are welcome 通常是回答谢谢.
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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