string(251) "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%B3%95%E8%A7%84%E7%AD%94%E6%A1%88%E5%AE%8C%E6%95%B4%E7%89%88 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
2020二建法规答案完整版
