????:1???????app:??????

2???????

3????????

4??????????

5???????

???6??6?? (?????? ???)??????????6?,????????5????????,?6???????1???????????????????

??,???5???????????20???25??,?????????????????12????????1.5???

??,???????,?????2?????????????????,??4???????????????6????????????,?1????

?????,??????????,?????

?,????(???????) ???:??????????????????