最新回答 / qq_慕神1420022
你那样写会得到一个空值,所以是NANhttps://www.61bcx.com/scratch3/work/822509https://www.61bcx.com/scratch3/work/823147https://www.61bcx.com/scratch3/work/825075https://www.61bcx.com/scratch3/work/816631https://www.61bcx.com/scratch3/work/820975https://www.61bcx.com/scrat...
2017-12-20
已采纳回答 / 陈小名3794133
你仔细想想,边框是对角切割组成的,如果上右下都是透明的,那么剩下的左边框,收缩的方向不就指向右边了吗?还是不理解的话,你就去看看这个http://www.jb51.net/article/42513.htm
2017-08-28