string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%88%98%E7%95%A5%E7%AE%A1%E7%90%86%E7%AC%AC%E4%BA%94%E7%89%88%E5%BE%90%E9%A3%9E%E8%AF%BE%E5%90%8E%E7%AD%94%E6%A1%88 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
战略管理第五版徐飞课后答案
