string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E7%BB%BC%E5%90%88%E9%98%B6%E6%AE%B5%E7%9C%9F%E9%A2%98%E7%B1%BB%E5%9E%8B => Failed to connect to 14.18.117.71 port 38133: Connection refused"
注会综合阶段真题类型
