string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E4%BA%8C%E5%BB%BA%E5%B8%82%E6%94%BF%E8%AE%B2%E4%B9%89%E8%80%83%E8%AF%95%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
2021年二建市政讲义考试答案
