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

2???app????

3?100??????

4?????200?????

5???????

?????????????????????11????????????????????22????????? ???,???????????????????,????????????,????????????????????????

??,??,??,??????????????,??????,???;??????????,????;???????????????,?????????????????,???????

?????????,??????,?????????????????????,?????????????????,???????????,????????????????????«?????»«??????????????????????»«??»?????????????,????????,???????;??;?????????;??????????,?????????????

???????:??