string(242) "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%E4%BA%8C%E6%89%B9%E7%AD%94%E6%A1%88 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
2021二建机电二批答案
