string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E5%8C%97%E4%BA%AC%E4%BA%8C%E5%BB%BA%E6%B3%95%E8%A7%84%E7%AD%94%E6%A1%88 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
21年北京二建法规答案
