??2???11??(? ?)11???,???????????????????1000??????,?1???15??85?????????????????
?????????????,??????8???????1500?????
???????????:??
??:?????80%??????????????
????MC?????????????????
????????:????????????!
??????:?????????????
????:???????3716??????????…
????????????????????
???:???????????????????
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3?29?16?????????
????????:????????????!
????:????????10?20?0.6
??????560?????????2000??
??????????????????????
????????????????????
?????????«????»:?????10%
????:?????????????????
??????????????????????
??????????????500????80%?
?????????????644?
??19????????????????????
??-???????2?????????
??????:?????????????
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3?29???????????
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