string(328) "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%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E8%BD%AC%E6%B3%A8%E5%86%8C%E9%9C%80%E8%A6%81%E6%B3%A8%E6%84%8F%E5%93%AA%E4%BA%9B%E4%BA%8B%E9%A1%B9 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
注册安全工程师转注册需要注意哪些事项
