Heat energy is a source of power， but （） will cause damage to the engine.
举一反三
- As a heat engine，（） energy is the source of power by which the diesel engine can be operated.
- Heat energy and energy are the middle processes of energy transformation in an electric power plant.
- The automobile engine is an internal combustion engine which converts the heat energy of fuel into mechanical energy to make the car move.
- Heat energy and energy are the middle processes of energy transformation in an electric power plant. (chemical / mechanical)
- The coal provides energy to power the (heat) （） system of hospitals.