string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E5%90%8E%E5%85%AD%E5%A5%97%E9%A2%98%E6%AF%94%E7%9C%9F%E9%A2%98%E9%9A%BE%E5%90%97 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
最后六套题比真题难吗
