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

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

3??????????

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

5??????????

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

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

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

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