string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E6%B3%A8%E5%AE%89%E8%80%83%E8%AF%95%E9%A2%98%E9%9A%BE%E4%B8%8D%E9%9A%BE => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2021注安考试题难不难
