供电组件能够提供28V直流电。 A: The power unit can supply 28 VD B: The power unit is capable of producing 28 VD C: The power unit may supply 28 VD D: The power unit would supply 28 VD

A technician receives a computer for repair and observes that the fan on the power supply is not moving. Which of the following should the technician do？ （） A: Move the power supply voltage switch to 220 volts. B: Add an additional fan to help cool the computer. C: Replace the cable that attaches the power supply to the motherboard. D: Replace the power supply.

Flower the power flows, put the following power supply unit components in the correct order:

The power supply system contains battery and alternator．

The power that an amplifier delivers to a load is equal to the difference between the power that the circuit draws from the power supply and the power that the circuit dissipates. ? 正确|错误

电力电子技术主要用于（ ）？ A: Information Processing B: Power Conversion C: Power Supply

She keeps a supply of candles in the house in case of power _____.

Given the self impedance at the fault location and the split coefficient of a certain power source to the fault location, the transfer impedance from the power source to the fault location should be ( ). A: self impedance times the split coefficient B: self impedance dividedby the split coefficient C: uncertain

The incorrect way to restore the power supply during the ship's voyage and stop the prime mover is . A: Quickly close the switch for power supply B: First start the first backup generator to supply power C: When invalid, start the second backup generator D: Start the emergency generator when B and C are invalid

For products where the firm has market power, coordination in the supply chain can be achieved and supply chain profits maximized through the use of