string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E9%94%80%E5%94%AE%E5%85%B7%E4%BD%93%E6%98%AF%E5%81%9A%E4%BB%80%E4%B9%88%E7%9A%84%E5%91%A2 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
网络销售具体是做什么的呢
