?? ?????????? ??????5.4?
????:1????????:????
2???????
3???app????
4???????????
5?????
?????11?22??????????? ?,?????????22???,??5.4?,?“??”?
??,????????22??18?45???????????20?22??20?????????????40???20??????????43????????21??29?,?????20?????40?????5.4????????????,??23.2???120.18??????????,?23.2??,???????????????7.7???????????
?????????????????????,?,?????????????????,?,????“???????????????”????????,?????????????????????????
??????????,???“?”,??“???”?
???,22?20???40??????4.7????????(?????????) ?????:????