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

2?????150????

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

4???????

5?????????vx

????????????1????????????3????? (???? ??????????????????????? ?????????)??3?????????????????????

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

???????????15????????,????????????????????????????

????10???,????10????????????????“??????”????,??????????????????,?“?”????????????

??????????????????,????6.2???????,??,???550??????,??????????

?????????????,???,??????????????,?170???,?????????

??????????,???????,?????????????????????,?????????????160???,????5??,?????????6????????,??10???????????,??????20%?(????????????????????) ???:????