a car showroom的用法和样例：
- In its first stage of development, the mall boasts 550 stores, seven cinemas, an ice-skating rink, a car showroom and space for 100 restaurants.
- A car is useless without petrol.
- His friend was injured in a car crash.
- A car journey is as fast as a train journey.
- A car overtook me although I was going very fast.
- A car suddenly pulled out in front of me.