???

????
1??????????????????????????
2???????????????????????
3?????????????????
4????????????????????????????
?????????????
??????????????????????????????
???????
1.??
???????????????????????
?????40????????????????
2.???
???????????????
45????12?
??????????46.8??16.5??17.6??26.3??12.6??11.9??10.5?????...

???????????????????????????????????????????????????????????????????????????????????????
????????????????????????????????
?

??????????????????,??????????.?????,?B2?,?C?2?,?3,5.??.?B2?,??,?,.?:???,?,?,?,??,?:??10,10,?15,20,?30,10,15,10,15,?5;????,?,,?,???,??:?10,15,??10,15,?15,?12,15,?10,15,10,?5,?;.???,??,.??,?,?.?,1???????1?,??.
????:
1.?,,?,???.,,?,?,,,.
2.??,?.?????,?.?,,,?.
3.?,????,?,???.
4.,??,???.
5.?????,,?,????...

???

???????????????????????
??????
???????????????????????
?????????????????(???)????(??)???\?????????????????????????????????????????????????????
???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????N????
???...