string(346) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%87%8D%E5%BA%86%E5%88%9D%E7%BA%A7%E6%B3%A8%E5%86%8C%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E8%80%83%E8%AF%95%E6%9C%89%E5%A4%9A%E5%B0%91%E4%BA%BA%E5%8F%82%E5%8A%A0%E8%BF%87 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
重庆初级注册安全工程师考试有多少人参加过
