2010-2011
3 3 3
1 1
A
B
C
D
2.
FF
AFFBFF
CFFDFF
3 F=60
A60 B120
C20 D180
4
A. B. C. D.
5 , , ,
6 3
A B
C D 3
7 0.1kg 0.08kg ( )
A B C D
8 1.013 105Pa 750mm
A B C D
9. 4
A B
C D 4