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%E6%95%99%E6%9D%902020%E5%92%8C2019%E6%9C%89%E5%8C%BA%E5%88%AB%E5%90%97 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
消防教材2020和2019有区别吗
