string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad%E7%AC%AC3%E4%BB%A3%E6%98%AF%E4%BB%80%E4%B9%88%E5%9E%8B%E5%8F%B7 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
ipad第3代是什么型号
