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

2??????????

3???????????

4????????????

5?????????

????????????2???20?? ??????19????????????,?????????????,??,????

?,???????,??“??????????????????????????”????????????,??,????,??????

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

?????,1?????????????????A???4.95??????????,?????????20%?

???????,???????????????,???????“???????????????”? ???????????????????:??????????