string(296) "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%E6%9C%BA%E7%94%B5%E5%AE%9E%E5%8A%A1%E7%9C%9F%E9%A2%98%E7%AD%94%E6%A1%88%E7%AC%AC%E4%BA%8C%E6%89%B9 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
2021年二建机电实务真题答案第二批
