string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2018%E4%BA%8C%E5%BB%BA%E7%AE%A1%E7%90%86%E7%9C%9F%E9%A2%98%E7%AC%AC31%E9%A2%98 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
2018二建管理真题第31题
