由0-图,得 ULI(O)=2V 12(O)=2V Ec(0)=2A 0+图 ++1V 5A ①5V A 122A( ) 2A 2V L2 2V L1 0 (0 ) (0 ) C = + + + = = i u u 由0-图，得 + - 5V 1 uL1 iC 5A 1 + - uL2 + - 1 1 1 1A 2A +-1V - 0 +图