??2?2?????????????????????????????????????? ??????????,?????2?????????1??????????????,???????,???????????????

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

????????????,???,????????????????????25%?,??10%?

??????????:??????? “????????”????

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

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

2???????????

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

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

5?????vx

??2?2?????????????????????????????????????? ??????????,?????2?????????1??????????????,???????,???????????????

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

????????????,???,????????????????????25%?,??10%?

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