Trains usually have two ________ to convert currents.
A: cooling fans
B: locomotives
C: circuit breakers
D: rectifiers
A: cooling fans
B: locomotives
C: circuit breakers
D: rectifiers
举一反三
- Trains usually have two ________ to convert currents. A: cooling fans B: locomotives C: circuit breakers D: ectifiers
- Trains usually have two to convert currents. A: coolingfans B: rectifiers
- When two two-terminal networks are equivalent, they are equivalent to ( ). A: external circuit B: internal circuit C: external circuit and internal circuit D: neither external circuit nor internal circuit
- Which of the following is used in an IBM Blade Center to provide cooling？（） A: Fans for each blade B: Chilled Water C: Blowers D: Freon
- In Britain, universities usually have __________. A: two terms B: three terms C: less terms than those in America D: no holidays