string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B6%88%E9%98%B2%E4%B8%AD%E6%8E%A7%E8%AF%81%E5%88%9D%E7%BA%A7%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
消防中控证初级有用吗
