string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%BA%E7%94%B5%E8%AE%B2%E7%9A%84%E5%A5%BD%E7%9A%84%E8%80%81%E5%B8%88 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
机电讲的好的老师
