string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E6%B3%A8%E5%86%8C%E7%A8%8E%E5%8A%A1%E5%B8%88%E6%95%99%E6%9D%90pdf => Failed to connect to 101.89.159.206 port 38100: Connection refused"
2021注册税务师教材pdf
