string(274) "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%B8%82%E6%94%BF%E5%AE%9E%E5%8A%A1%E5%A4%9A%E5%81%9A%E9%A2%98%E8%83%BD%E8%BF%87%E5%90%97 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
二建市政实务多做题能过吗
