string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E7%BB%8F%E6%B5%8E%E5%A4%9A%E5%B0%91%E9%81%93%E9%A2%98 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
一建经济多少道题
