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

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

3???????

4????????vx

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

??????????2?????????21?? (?????? ???????????????)???????????20????????????????????,??«???????????»????????????????????????????7?????????,???

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

??????????????,??????????

?,??????,???????????????????????

????????????,???????????????????,????????????????,????13?????

???,??,???????1????????????????????12?????97%?

?????????????????????????86??????????????????????

??????????????????????2??????1??????,????,???????????????25%??????????????????????,?10%????????????2?3???,????,????????????,??????30???????????????????????2????10???,??????3?12???????????????????????????????25%??(?????) ????????????????????????????????:??????