string(371) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E5%95%86%E6%98%AF%E4%BB%80%E4%B9%88%E5%B7%A5%E4%BD%9C%E5%86%85%E5%AE%B9%2C%E7%94%B5%E5%95%86%E7%9A%8410%E7%A7%8D%E8%BF%90%E8%90%A5%E6%A8%A1%E5%BC%8F%E6%9C%89%E5%93%AA%E4%BA%9B%E7%89%B9%E7%82%B9 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
电商是什么工作内容,电商的10种运营模式有哪些特点
