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

2????????

3??????????

4???????

5??????????

???????????????“????????????”!??????!??????

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

???,??3D??,??????????????,?????,????????????????????,??3D????????????

???????,??????????????3D??,?????????????????????????????????????,???,????????,???????????????????,??????

???? ?:??????????????,70%???,?????????????????????,????????????????

???,???????????,????“????????????”??,?????????????????????????????,????,??????????20%???????30%??,?????????????

?????? ??????????:??“??”???????30???40??????,????“????”?,??20%-30%?

?????????,????7???????????????????24?????,????????????????

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