they have f( ) playing with their families and their friends
题目
they have f( ) playing with their families and their friends
答案
They have f(un ) playing with their families and their friends.
和家庭以及朋友玩耍他们觉得开心
have fun doing做...开心
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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