string(283) "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%E6%98%AF%E4%B8%80%E4%BB%BD%E6%80%8E%E6%A0%B7%E7%9A%84%E5%B7%A5%E4%BD%9C%E5%91%A2 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
网络销售是一份怎样的工作呢
