suppose you are the finder of the wallet in the second sample.write an announcement to be put up in
题目
suppose you are the finder of the wallet in the second sample.write an announcement to be put up in
答案
Someone has lost his wallet.It is now in the headmaster's office.Please come and claim it between 1:30 and 4:30 pm .
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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