string(336) "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%90%8E%E5%A4%9A%E9%95%BF%E6%97%B6%E9%97%B4%E8%83%BD%E6%8B%BF%E5%88%B0%E8%AF%81%E4%BB%B6 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
注册安全工程师注册后多长时间能拿到证件
