2018 16 2 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 5 1 14 17 18 19 20 L2 L3 L2 L1 L2 21 1.2 0.3 2 4 22. 23 1 4 24 t m Q c 1 m Q 1 c 1 t 1 6 1 30 25 1 26 1 43 2 48 7 3 27 1 2 b 3 4 28 1 2 3 29 1 c 2 0 0.6A 0 3A 3 0.28 30 1 2 3 L2 4 5 2 16 C B B A C B D A D C D A D C D B 12 11 31 10 1 m=2t=2000kg - 1 Q cm t2 t1 4.2 10 3 J/(kg ) 2000kg 45 20 2.1 10 8 J - 3 2 Q Q 100% 3 . 0 J 10 1 . 2 8 100% 7 10 8J - 3 3 m q Q kg J / 10 0 . 3 J 10 7 7 8 23.33kg - 3 ( ) 32 6 1 L1 L2 - 1 U1=U U2=6V 3.6V=2.4V - 2 2 L1 L2 - 1 I1=I I2=0.5A 0.2A=0.3A - 2 ( )
