“必须求出此电阻上的电压和电流。”一句的英文表达，哪一项正确？
A: It is necessary to find out the voltage and current of this resistor.
B: It is necessary to find out the voltage and current on this resistor.
C: It is necessary to find out the voltage and current for this resistor.
D: It is necessary to find out the voltage across and current through this resistor.
A: It is necessary to find out the voltage and current of this resistor.
B: It is necessary to find out the voltage and current on this resistor.
C: It is necessary to find out the voltage and current for this resistor.
D: It is necessary to find out the voltage across and current through this resistor.
举一反三
- When a BJT is in cutoff, the collector-to-emitter voltage is typically equal to _____ A: collector supply voltage B: collector current times collector resistor C: 0.3 Volts D: emitter voltage
- When a BJT is biased in the cutoff region the collector-to-emitter voltage is typically equal to （ ）. A: the emitter voltage B: the collector supply voltage C: 0.03 V D: the collector current times the collector resistor
- When a BJT is operating in the active region, the voltage drop from the base to the emitter VBE is approximately equal to the____ A: base bias voltage B: base current times the base resistor C: diode drop (about 0.7 V) D: emitter voltage
- The voltage meter and current meter on the main switchboard shows ( <br/>). A: phase voltage and phase current of generator B: line voltage and line current of generator C: line voltage and line current of crane D: line voltage and line current of shore power
- To find the right job in a desired field, it is necessary that you ____ what the current trends are.