????:1??????100???:?????????????

2???????

3??????????

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

5?????????

???12???20??????????? ?,??????,?,??,???????24???????????????

??????????,12??????????????????????17????19??????,??“????”??????????18???????????1000????

??,?????????????????24%,????;??????48%,??????8?????

?????????????,???????????,?????,?? ??????:??????????????????