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

2?????24????

3?????

4?????98?

5???????6??98??

??11??30??????????? (?? ?????)??????????30???????,11???????????????50%,????0.2?????????????,?????????????????6????????????????50%??,?????????

??????????????,??,???????????0.3????0.9????????????????;???????????????????;???????????????????????????????

?????,11??,??50%,?????????,?????????????????,?????60%?????,???????????????;????52%??????????????????????,?????;?????55%???????????????,?????????????????,??????

??????????????,????????????????,??????,??,????????????????,?????11?,???,????????????????(?????????????????????????) ????:??????????????????????