????:1???kb???:????????

2?????????

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

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

5????????????

??????12?????????????????????????20???????????? (?????? ????)??????20??????????????????

???????????????????? ??????????? ????

???????:????????????????????,?????????«??»??????????«???????????»???,????????????????????????,??????“???????????????”????????,????????????

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

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

????????????????,??,???,???40???200???????????,???????????,????“???????”??,??????????????

??,??,?,???,???????????“??????????”??????,???????????,?????,???????????????,????,???????????,?????????????????,??????????????????(????????????)

???:?????