string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=300m%E5%92%8C100m%E5%AE%BD%E5%B8%A6%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB => Failed to connect to 101.89.159.206 port 38100: Connection refused"
300m和100m宽带有什么区别
