string(316) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E6%B3%A8%E5%86%8C%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E5%8C%96%E5%B7%A5%E5%AE%9E%E5%8A%A1%E8%80%83%E8%AF%95%E7%AD%94%E6%A1%88 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
2020年注册安全工程师化工实务考试答案
