string(294) "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%E5%B7%A5%E7%A8%8B%E5%B8%88%E6%95%99%E6%9D%90%E6%AF%8F%E5%B9%B4%E6%9B%B4%E6%96%B0%E5%90%97 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
一级消防工程师教材每年更新吗
