string(279) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E6%B3%A8%E5%86%8C%E6%B6%88%E9%98%B2%E5%B7%A5%E7%A8%8B%E5%B8%88%E7%9C%9F%E9%A2%98%E7%AD%94%E6%A1%88 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
2020年注册消防工程师真题答案
