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

2??????

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

4???????

5?????????95?98?

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

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

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

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