string(267) "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%BB%80%E4%B9%88%E5%B7%A5%E4%BD%9C%E5%86%85%E5%AE%B9 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
网络销售是什么工作内容
