string(296) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E4%BB%A5%E5%90%8E%E6%B6%88%E9%98%B2%E4%B8%AD%E6%8E%A7%E5%88%9D%E7%BA%A7%E8%AF%81%E8%BF%98%E8%83%BD%E7%94%A8%E5%90%97 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
2020年以后消防中控初级证还能用吗
