string(271) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E5%B8%82%E5%9C%BA%E8%90%A5%E9%94%80%E8%87%AA%E8%80%83%E8%80%83%E8%AF%95%E7%A7%91%E7%9B%AE => Failed to connect to 101.89.117.144 port 38056: Connection refused"
2021年市场营销自考考试科目
