?????????????
????(?)
????1???????
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????2????????
????(1)?????????????
????(2)????????
????(3)????????????(??????????????)
????(4)?????????????????
????(5)????????????
????3???????
???????25????????15??????????????幤????;
???????????8:30??12:00;????1:30??5:30??
????4????????
????500-800???
????????????500???
????????????800???
????(??)
????1???????
????????????Σ?????????????
??????????μ?????????????μ???????????????????????????????????????????????????
????2????????
????(1)??????????????????(????????????????????????)????;????????????????á???á?
????(2)?????????????????(??????????????????????????)????;??????????????????;???????????????á????;????????
????(3)????ò???????
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????4???????
?????????????壺??5??30???7??30??
??????????????????(?????2-4???????????????????)
????5???????
???????????(??????????????????)
????6????????
????1??1200? 15???+??3??????
????2??1000? 13???+??2??????
????3??800? 10???+??1??????
????1+2 2000?
????2+3 1600?
????1+2+3 2700?
????7???????????????????????