string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad2019%E5%92%8Cipad2018%E5%93%AA%E4%B8%AA%E6%80%A7%E4%BB%B7%E6%AF%94%E9%AB%98 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
ipad2019和ipad2018哪个性价比高
