string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E4%B8%AD%E7%BA%A7%E8%80%83%E8%AF%95%E9%9A%BE%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
21年中级考试难吗
