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??????????????????δ????????2011-07-02 13:35:24
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1.?????????
a????????????<=10??????????7??.
b????????????>10????????????3??.
2.??ν???????
a??????????????????????????????????????
b?????????????????
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1.????????????????Щ??
a.??????????????.
b.?????.
c.???????????????.
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2.??ν???????
a?????????????????
b??????????????????????????????.
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1.????????.
a.????????1??2JC=4??1JC ??1??3JC=9??1JC ??JC???????д??
b.??????????????????????????е??????1JC???????????2 1 1??????????4+1+1=6.
c.???????????????3??????????????????????????????????????????????????????????
????????????2 1 1 ?????13000
???????????2 2 1????????4+4+1=9????????19000
?3???????2 1 1 1 ????????4+1+1+1=7????????10000
????10000<13000<19000???????????????3??????????
?????????3JC??????.
d.?????????????????3??2 1 1 1????????2 2 1 1????????????????
2.????????????
a.?佫????????????????????????????
b.????????????????????
c.???г??????0
3.??β???????
a.?????н?????0????????С????????
4.?????????????????
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1.??ν???????
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b????????????——???????
c??????????????????????????????????
2.??????????
a??????
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c???????????——?????
d????????????????????????????????????
???????????????????е?????????????????????
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????????????????????????????????????????40407???????40407????????
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