power pack ______
举一反三
- Listen to the mannufacturer of a power pack talk about his new product and fill in the missing words.
- The electric motor gets its electric power from a high-voltage battery pack which is recharged by plugging into standard 220-volt outlet.
- 中国大学MOOC: The company has announced that it has invented a large power pack to run home ___ like refrigerators and washing machines when the electricity goes out.
- When the engine, generator and battery work together to supply right amount of electric power to the electric motor, or the engine and the generator charge the battery pack, it operates in series mode.
- (5) A. pick B. pack A: pick B: pack