string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad%E5%90%84%E5%9E%8B%E5%8F%B7%E5%8F%82%E6%95%B0%E5%AF%B9%E6%AF%94%E5%9B%BE => Failed to connect to 14.18.46.51 port 38044: Connection refused"
ipad各型号参数对比图
