单项选择题

The best title for the passage is ______

A．Preparing the Ground for a Pump System
B．Pros and Cons of the Ground-Source Heat Pump
C．How to Know Whether an Oil Burner is Right for Your Home
D．The Ground-Source Heat Pump: It Works for Me!

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热门试题

单项选择题

One benefit the author mentions is that the system ______

A．uses no electricity
B．has a fire-safety shutoff
C．docs not pollute the air in the house
D．requires less insulation in house walls

单项选择题

The passage suggests that the author's heat-pump system absorbs heat from ______

A．soil in a nearby field
B．sun panels at ground level
C．a pipe buried next to the walls
D．a tank of propylene-glycol