Trains usually have two to convert currents.
A: coolingfans
B: rectifiers
A: coolingfans
B: rectifiers
举一反三
- Trains usually have two ________ to convert currents. A: cooling fans B: locomotives C: circuit breakers D: ectifiers
- Two trains ______ head-on in Ohio early this morning. (U2—B)
- Usually, a student card (able) ______ me to travel half-price(半价) on trains in China.
- In Britain, universities usually have __________. A: two terms B: three terms C: less terms than those in America D: no holidays
- Which of the following statements is true（）. A: There is a strike across the country. B: Many trains have been cancelled. C: A few trains have been cancelled. D: There is a strike in the North Region.