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

2????KB???

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

4???????

5???????

?????????????????2?????????????????22??? ???:??22?????????????,????21??????????????,????????????????????????????

????,?????????????????????????????????,???????B-1B???20?????????????,?????????????????,????????,???,????????????????????????????3?“?????”??

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

???????,???????,????????????????????,???????????????(????????????) ?????????:????