string(301) "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%E5%B7%A5%E7%A8%8B%E5%B8%88%E5%93%AA%E4%BD%8D%E8%80%81%E5%B8%88%E8%AE%B2%E7%9A%84%E8%AF%BE%E5%A5%BD%E4%B8%80%E4%BA%9B => Failed to connect to 61.171.74.35 port 38027: Connection refused"
消防工程师哪位老师讲的课好一些
