They are not professional players;they play football just for f___.
题目
They are not professional players;they play football just for f___.
Tony's father was an engineer five years ago.对an engineer 提问
We will live on a space station in 50 years.对in 50 years提问
答案
They are not professional players;they play football just for 【fun.】Tony's father was an engineer five years ago.对an engineer 提问 What was Tony's father five years ago We will live on a space stat...
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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