string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E4%BA%8C%E5%BB%BA%E5%BB%BA%E7%AD%91%E5%AE%9E%E5%8A%A1%E7%B2%BE%E8%AE%B2 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2020二建建筑实务精讲
