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!

<上一题目录下一题>

热门试题

单项选择题

According to the passage, the author's heat pump requires ______

A．no maintenance
B．very little maintenance
C．only a yearly check of controls
D．no more maintenance than an oil burner

单项选择题

According to the passage, which of the following statements is TRUE

A．I had never mingled with tramps and beggars in my life.
B．I first became aware of the unemployment problem in 1938.
C．Young miners and cotton workers had been brought up to work.
D．Young miners could all find work if they wanted to.