string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E8%BE%A9%E8%AF%86%E7%8E%89%E7%9A%84%E7%9C%9F%E5%81%87 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
怎么辩识玉的真假
