Hướng dẫn và trắc nghiệm nghe toefl itp thuộc 20 câu sau - Mã 97013438

A particular kind of heating device.

The benefits of new reflectors.

Using solar energy for heat.

Identifying different varieties of quartz.

Convection.

Sympathetic vibration.

Infrared heat.

Quartz heater.

He asks her for an example.

He asks her how a quartz heater works.

He asks her to explain his design.

He asks her to give a definition.

According to the instructor, how was the quartz heater different from other types of heaters?

It is more expensive.

It is lighter in weigh.

It is more common.

It heats only the objects in a room.

It collects sunlight.

It measures the temperature of a room.

It moves air around the room.

It directs radiation at objects.

Hướng dẫn và trắc nghiệm nghe toefl itp thuộc 20 câu sau – Mã 97013438