A central heating and cooling ___________ produces warm or cool air in one central area and distributes it throughout the building.
举一反三
- The passage tells us that there is ______. A: a central library in each area B: a library in the center of each area C: one central library for all areas D: more than one central library in each area
- What’s the most popular heating system according to the engineer A: Every room has a heater. B: The Central room has a heater. C: A heat chamber heats air and passes the warm air through ducts and openings into rooms. D: The rooms are installed with blowers or convection.
- With （）， the corrosion problems are much reduced in a central cooling system.
- Gas central heating provides instant warmth and a ____ supply of hot water.
- We’ve just installed central heating. This should make a tremendous difference to the house next winter. We’ve just installed central heating, _______________________________.