string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%B3%E8%81%94%E8%AF%8D%E7%9A%84%E5%A1%AB%E7%A9%BA%E9%A2%98%E8%A7%A3%E7%AD%94 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
关联词的填空题解答
