string(228) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AE%BD%E5%B8%A6mb%E5%92%8Cmbps%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 125.88.227.171 port 38114: Connection refused"
宽带mb和mbps的区别
