电压的参考方向为()
A. 电源外部从正极指向负极
B. 电源内部从正极指向负极
C. 电源外部从负极指向正极
D. 电源内部从负极指向正极
电动势的参考方向为()
A. 电源外部从负极指向正极
B. 电源外部从正极指向负极
C. 电源内部从负极指向正极
D. 电源内部从正极指向负极
[音频]Identification. Match the nouns in Column II with the verbs in Column I according to the orders given by Henry's wife.Column I
[音频]音频同连线题(2913)Fill in the blanks to complete the following statements.Before Henry's wife went to ___________; she asked him not forget to do his _________________.