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%E6%B3%A8%E4%BC%9A%E5%93%AA%E4%BA%9B%E7%A7%91%E7%9B%AE%E5%8F%98%E5%8C%96%E4%B8%8D%E5%A4%A7 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
2021年注会哪些科目变化不大
