??????39???????? ?????????′?????

39????????????????????Щ??????????Щ??????壬???????????????????????65???????????????39?????

???????10?????????5????

1.39???????(10??)??????????45??????????(5??)?30??????4???1??(2.5??)? 20???????????(15??)?60????????????(20??)?70??????

2.???????????????????з??????￡???????????????С??1—2?????????????????????????2-4????????????2-3????????????????????????????????65???????????????????仯??2-4???????????????????????????á?

?????????????????????0.1???

??????????????????????????????????????????????????????????????и????????????????????0.1??磬??????????

?????????0.1???=1????

???????????

1.??????????????????????????????????????90???--????—+(????*2)??????????2???????????95????

2.?????????*2???????????????????0.1 ????95??????????????????;?????94??????????????0.1????96???????????????????0.1-0.4??????????95?????????0.1-0.4;??練?????????95????????0.1-0.4

???磺a.?????10 ??????????0.6?????????e??????90-10+0.6*2=81????94???????????????0.1?????????95???????????????

b.???????????0.7?????????????????????2?????93??????????0.7???????????97???

c.?????????1.2?????10????????78????97?????????????77???92?????????????????????