string(253) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E4%B8%80%E5%BB%BA%E5%BB%BA%E7%AD%91%E5%AE%9E%E5%8A%A1%E8%83%8C%E8%AF%B5%E7%82%B9 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
2020一建建筑实务背诵点
