string(271) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E5%B8%82%E6%94%BF%E5%B7%A5%E7%A8%8B%E7%9C%9F%E9%A2%98 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
2021一级建造师市政工程真题
