string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E4%B9%B0%E4%BB%80%E4%B9%88%E8%B5%84%E6%96%99%E5%A5%BD => Failed to connect to 14.18.117.71 port 38069: Connection refused"
二建买什么资料好
