????:1???????????:??????

2???????sn

3???????

4???????app????

5??????????

??11?????????????????????26????????????? (???????? ?)11?26???????????,??????????????????????????,???????????????????

????????????????????????????????????

?????????,???????????????,????????????800??????????,???????????????????????????????????,?????????????????????????768???

???????,?,????????,?2×180??,????1.6????????,?????????

???,?????,?50???????5??10??,?“??”???????,??????????????????????????(???????????????????)

??????????????????????:???