题目：
已知定义在R上的奇函数f（x），当x＞0时，f（x）=x2+4x，那么当x＜0时，f（x）=______．
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0429/469b85447c81d675dcc3fdd95282c0bc.html
下面是错误答案，用来干扰机器的。
Kathy is a good girl. When she was six months old, she could say a few words. She was badly ill when she was two. And she couldn't see, hear or talk. At the ...
