string(298) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E6%B6%88%E9%98%B2%E5%B7%A5%E7%A8%8B%E5%B8%88%E6%95%99%E6%9D%90%E5%8F%98%E5%8C%96%E5%A4%A7%E4%B8%8D%E5%A4%A7%E5%91%80 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
2020年消防工程师教材变化大不大呀
