string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E4%B8%80%E7%BA%A7%E6%B6%88%E9%98%B2%E5%B7%A5%E7%A8%8B%E5%B8%88%E6%8A%A5%E8%80%83%E6%9D%A1%E4%BB%B6 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
21年一级消防工程师报考条件
