string(262) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E6%B3%A8%E5%AE%89%E5%AE%89%E5%85%A8%E7%94%9F%E4%BA%A7%E7%AE%A1%E7%90%86%E7%9C%9F%E9%A2%98 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
2020注安安全生产管理真题
