string(249) "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%E9%9A%BE%E5%BA%A6 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
注册消防师考试难度
