2019-2020
1 320g 0.8 103kg/m3
280g
A 40g B 280cm
3
C 120g D 200g
2 m/V
A B
C D
3 . .
A B
C D
4 SSO OC
( )
ABCD
5
A
B
C
D
6 20cm
8cm
A B
C D
7
A
B
C
D
8 ( )
