string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E8%B5%B5%E9%87%91%E5%87%A4%E8%AE%B2%E8%AF%BE%E6%80%8E%E4%B9%88%E6%A0%B7 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
二建机电赵金凤讲课怎么样
