string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%AB%99%E6%8E%A8%E5%B9%BF%E7%9A%84%E8%81%8C%E8%B4%A3%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.159.206 port 38187: Connection refused"
网站推广的职责有哪些
