string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E7%90%86%E6%95%99%E6%9D%902021%E6%9B%B4%E6%96%B0%E5%AF%B9%E6%AF%94 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
监理教材2021更新对比
