string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E4%B8%AD%E7%BA%A7%E6%B3%A8%E5%AE%89%E9%80%9A%E8%BF%87%E7%8E%87 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
2020中级注安通过率
