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

2?????????

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

4?????

5????????vx

????????????????????????8?23??????????????? (???????? ???????????????????? ?????????????????)????????????????????23???????????????????,??????????????«??????(??)»(???«????????????????»)???????????????«??»???????????,?????????????????,??????????????????????????10%?15%??,?????????

??,??,«??????»????,??20????????(??????,???)??????????????,?????????,????,?????????????????????,???,???????

????????????????????,«???????????»??????????????,?????????????,?????????1000?????????????????????????????????,?????,?????

????,???????????????????????,«????»?????«??»?????????,???,????????????;????,??,?“?????”?

«??»??????????????,??????“????”???,????,??????,????(??????????????????) ???:??????????