string(262) "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%B0%B4%E5%88%A9%E5%AE%9E%E5%8A%A1%E6%9C%80%E5%90%8E%E4%B8%80%E9%A2%98 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
2020二建水利实务最后一题
