string(287) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2019%E6%B3%A8%E5%86%8C%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E7%AE%A1%E7%90%86%E7%9C%9F%E9%A2%98%E8%A7%A3%E6%9E%90 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
2019注册安全工程师管理真题解析
