string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E7%BA%A7%E6%B6%88%E9%98%B2%E6%B3%A8%E5%86%8C%E5%B7%A5%E7%A8%8B%E5%B8%88%E6%95%99%E6%9D%90%E6%98%AF%E8%B0%81%E7%BC%96%E7%9A%84%E5%95%8A => Failed to connect to 101.89.166.210 port 38089: Connection refused"
一级消防注册工程师教材是谁编的啊
