string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%AF%E4%BB%A5%E7%BD%91%E4%B8%8A%E6%8E%88%E8%AF%BE%E5%B9%B6%E4%B8%94%E8%83%BD%E8%B5%9A%E9%92%B1%E7%9A%84%E8%BD%AF%E4%BB%B6 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
可以网上授课并且能赚钱的软件
