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．does not pollute the air in the house
D．pollute the air in house
<上一题 目录 下一题>
热门 试题

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
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．The Ground-Source Heat Pump
D．It Works for Me!
相关试题