string(295) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%80%89%E6%8B%A9%E6%81%B0%E5%BD%93%E7%9A%84%E5%85%B3%E8%81%94%E8%AF%8D%E8%AF%AD%E5%A1%AB%E7%A9%BA%2C%E5%8F%8A%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
选择恰当的关联词语填空,及答案
