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

2??????????

3?????ppt

4?????

5???????

????8???13?????????????? (??? ?????????????????????)8???????13???????,?????,????????,????????????,?13????????16???????????????,?????????????

????? ????

??,?,?????????????????“???????????????”,????????????,?????????????????78.2??????,????????????????3521??????????????

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

??????????????,?????????????????“??????????”“???????????”????????????,??,?????????????,?????,?????????????????,????????????3.4??????????,??,????????????????

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

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

?????:???????????????????