string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E7%BA%A7%E8%80%83%E8%AF%95%E8%80%83%E5%89%8D%E6%8A%BC%E9%A2%98 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
中级考试考前押题
