题目内容

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

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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.

If Timer 0 of 8051 counts in mode 2, after executing the instruction “MOV TL0, #00H”, it will generate the overflow after counting ______ numbers.