string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E8%AF%BE%E4%BB%B6%E7%99%BE%E5%BA%A6%E7%BD%91%E7%9B%98%E4%B8%8B%E8%BD%BD%E9%93%BE%E6%8E%A5 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
一建课件百度网盘下载链接
