1、 - 1 - 02 1 L1 L2 ( ) A L1 B L1 C L2 D L2 D 2 S a L b L - 2 - c L d L a b c d ( ) A B C D A 3 ) ac cd (n 1) U ( ) A nU B. U nC (n 1)U D. U n 1 A - 3 - cd R ac (n 1)R U = U R (n 1)R+R)= nU, A 4 ) 3.0 V L1 L2 L3 ( ) A L1 L2 2 B L3 C L3 1.20 W D L2 L3 3 W C 5 )( ) E 3 V L S 1 R L S 2 L M ( ) A - 4 - B
2、C 1 V D 93.3% AD 6 A B ( ) t n B R ( ) A I ne t B I 2ne t C I ne t D I 2ne t A B A B R A t n B R I ne t R 7 ) U S I - 5 - e m l ( ) A. I l eSm 2eUB. I l em 2eUC. I eSm 2eUD. IS l em 2eU B 8. 2016 A C S A A B C C D BC A A C BC - 6 - A 9 ) R1 R2 R3 R4 C1 C2 P Q P Q ( ) A R1 B R2 C R3 D R4 C C1 C2 R4 P
3、 Q C1 C2 R3 R4 C 10 E r A B R1 R2 P a S A V I U. ( ) A R2 P b I U - 7 - B A B C R1 I U D R1 U I BD 11. R1 R2 R3 R4 C1 C2 E, r 0. ( ) A R1 C1 C2 B R2 C1 C2 C R3 C1 C2 D R4 C1 C2 BD R1 R1 R1 C1 C2 C1 C2 A R2 C1 C2 C1 C2 B R3 C1 C2 C1 C2 C R4 C1 C2 C1 C2 D 12 )( ) I U P R2 Q C W q ( ) - 8 - AB R2 P I 2 R P I 2 A C UC E I(R2 r) Q CUC C Q I C(R2 r) Q I B U E Ir U I C q W qE E W I D 13. S P ( ) A B L2 C L1 D C C - 9 -
