string(305) "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%E8%80%83%E5%93%AA%E4%BA%9B%E7%A7%91%E7%9B%AE%2C%E9%9C%80%E8%A6%81%E5%93%AA%E4%BA%9B%E4%B9%A6 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
消防工程师考哪些科目,需要哪些书
