When they issue an invitation to somebody they are not just being polite and of that person accepts
题目
When they issue an invitation to somebody they are not just being polite and of that person accepts
答案
当他们对某人发出了邀请,他们不仅仅是礼貌,也不是只给那些接受邀请的人.
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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