string(227) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad2019%E5%92%8Cipad2020%E5%8F%82%E6%95%B0%E5%AF%B9%E6%AF%94 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
ipad2019和ipad2020参数对比
