string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E5%BB%BA%E7%AD%91%E5%AE%9E%E5%8A%A1%E5%90%AC%E8%B0%81%E7%9A%84%E8%AF%BE%E6%AF%94%E8%BE%83%E5%A5%BD%E8%80%83 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
二建建筑实务听谁的课比较好考
