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

??,???,???

???????????,??,???0.4????????????????,??????0.6????

??????????100???????30???????????????????????????????????,??????8??????13???????????

(????????????? ????????????)

?????????????????????????????:??????????? ??“????v”

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

????:1?????v:????????

2??????

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

4???????

5?????????

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

??,???,???

???????????,??,???0.4????????????????,??????0.6????

??????????100???????30???????????????????????????????????,??????8??????13???????????

(????????????? ????????????)

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