string(265) "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%E6%B3%95%E8%A7%84%E8%AF%BE%E5%90%8E%E6%80%9D%E8%80%83%E9%A2%98%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
建设法规课后思考题答案
