string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%86%8C%E6%B6%88%E9%98%B2%E5%B8%88%E8%80%83%E8%AF%95%E7%A7%91%E7%9B%AE%E9%9A%BE%E6%98%93%E7%A8%8B%E5%BA%A6%E6%8E%92%E5%90%8D => Failed to connect to 14.18.117.71 port 38164: Connection refused"
注册消防师考试科目难易程度排名
