1、 2018 1 90 6 2 3 3 15 1 A 150g B 5m/s C 2A D 20N 2 ( ) A C 3 A B C D 4 L1 5 S1 S2 S1 S2 L1 L2 g 10N/kg C =4.2 10 3 J/ kg o C A 3.5V 8.5V B 8.5V 3.5V C 3.5V 5.0V D 5.0V 3.5V 2 34 6 _ _ 7 100N 6N _ 6N 10N 20N _N 8 _ _ 9 4 9 _ _ _ 9 10 10 _ _ 11 7 J/kg 210g _ J _ kg 3 J/ 12 A1 A2 A3 _ _ 12 13 13 L1 L2
2、_ S1 S2 S3 L1 L2 L1 U1 L2 U2 U1_U2 1 17 14 (1) _ _ (2) b _ _ / (3) _ 15 (1) _ _ _ (2) _cm 15cm _ _ _ 16 (1) _ _ (2) _ _ _ 17 6 18 6 19 7 19 17 6 V 2.8V A 0.8A A2 0.2A A1 L2 18 6 20m/s 20KW 10km q 7 J/kg 25% (1) (2) (3) 19 7 500N 10s 4m 300N 1 2 3 800N 1 5 20 2012 11 25 8 9 15 9 8 14 (1) A B C D (2)
3、15 _ (3) _ (4) _ / (5) _ / 1 A 2 D 3 D 4 C 5 C 6 7 10 8 9 10 11 6 100 12 3 2 1 1 1 1 13 S3 14 1 2 3 15 1 2 10.0 16 1 ) 2 17 A1 IA1=I IA2=0.8A 0.2A=0.6A L2 2.8V A1 0.6A L2 2.8V 2.8V 18 : (1) (2) 20KW (3) 25% 19 1 2 W P= =240W 2 W 3.3% 3 F= G +G 500N 300N G =2F G 500N=100N 800N F= G = 100N+800N =450N 20 1 B 2 3 4 5
