电阻并联电路的等效电阻( )。
A. 大于各支路电阻
B. 小于各支路电路
C. 具体电路具体分析
理想电流源输出恒定的电流,其端电压的大小由( )决定。
A. 导线
B. 负载
C. 内阻
To show upper case English letter 'H' on a common cathode 7-segment display, the segment code should be set with ______ H in hex form.
Memory address ______ H in the interrupt vector table is assigned to Timer 0, and the memory address ______ H is assigned to external interrupt 1.