string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BB%BA%E8%AE%BE%E5%B7%A5%E7%A8%8B%E7%9B%91%E7%90%86%E7%AC%AC%E4%B8%89%E7%89%88%E8%AF%BE%E5%90%8E%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
建设工程监理第三版课后答案
