下面哪一句不是在描写发动机？ A.
The engine is the heart of an automobile. B.
They are working under high pressure, high temperature and changeable conditions C.
These individual system interact with each other closely to make the wheels run and the car move safely and smoothly under the control of the driver. D.
On the whole, you should often maintain and check the engine .
The engine is the heart of an automobile. B.
They are working under high pressure, high temperature and changeable conditions C.
These individual system interact with each other closely to make the wheels run and the car move safely and smoothly under the control of the driver. D.
On the whole, you should often maintain and check the engine .