string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%BA%8C%E5%BB%BA%E6%9C%BA%E7%94%B5%E8%80%83%E8%AF%95%E5%A4%A7%E7%BA%B2 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
2021二建机电考试大纲
