string(294) "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%E9%80%89%E6%8B%A9%E9%A2%98%E7%AD%94%E6%A1%88%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
建设法规课后选择题答案是什么
