Registered guest at hotel hangs on the door of the guest room a DND sign,
题目
Registered guest at hotel hangs on the door of the guest room a DND sign,
接上,because he or she wishes to have the room cleaned.
判断对错?
答案
Registered guest at hotel hangs a DND sign on the door of the guest room because he or she wishes to have the room cleaned
hangs a DND sign on the door 比较通顺点
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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