string(337) "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%E6%B3%A8%E5%86%8C%E5%AE%8C%E6%88%90%E9%9C%80%E8%A6%81%E5%A4%9A%E9%95%BF%E6%97%B6%E9%97%B4%E6%8B%BF%E8%AF%81 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
注册安全工程师注册完成需要多长时间拿证
