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

2?????

3?????????

4???????

5????????

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

????“???????????????”??????,????????????????????,?????????100??????????????400????,??????????????????“1:1????????????”???,???100?????,1000?????????????;???????????????,?????,???

???,??,?????????????????????????????,???????????«??????????????»???,?????,???????????;??,???????

?????,??????????????????????,??,??????;??,????? ???????:?????????