string(242) "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%E6%9C%BA%E7%94%B5%E7%AE%A1%E7%90%86%E7%AD%94%E6%A1%88 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
2020二建机电管理答案
