中国大学MOOC: Through long power lines electricity goes .
举一反三
- 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.
- Electricity comes into our houses from power stations by flowing through electric ______ and cables .
- 中国大学MOOC: city electricity
- 中国大学MOOC: Mooring lines include head lines, stern lines, spring lines and breast lines.
- Power control unit: controls the flow of electricity;