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

????:??????????:51??app???????

???????????????????8????5????? ??????????,?????8??????5????10?:??8???5????????14???????????????6??14???????????,??????????????????????????????????????????????20??,?????????????,????????????????????????????50??,??80??;???????????????????????????????????????????????????????????????????????8-10?????????

?:

1.????????????????????????,??;

2.??????????,?????????;

3.????????????,????????????????????????????????;

4.?,????,??????????????;

5.???????????????,??????????????????

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