Question

【题目】 Infrared thermometers（红外温度计）, or temperature guns, have been widely used to detect（检测）the early symptoms of COVID-19. They allow us to measure（测量）temperatures quickly. How do these thermometers work?

They determine temperature by measuring the energy coming from your skin （皮肤）. Everything in nature has molecules （分子） inside of it that are always moving around. This include our skin. The higher the temperature is, the faster the molecules move. The molecules give off infrared light while moving.

This kind of light can be focused or absorbed（吸收）. The thermometers use a lens（镜头）to focus infrared light from the skin onto a detector called a thermopile（热电堆）. The thermopile absorbs the infrared radiation and turns it into heat. The electronic sensors inside the thermometers can measure the heat and read the temperature of the skin after making some calculations （计算）.

However, you might sometimes find that the results aren’t always accurate （准确的）. It depend on how these devices are used. For example, how far away they are held from the body, how steadily they are held and for how long. Factors such as make-up and sweat will also affect the results.

【1】Temperature guns, have been widely used to detect （检测）the early symptoms of____________.

A.COVID-17.B.COVID-18.C.COVID-19.D.COVID-20.

【2】They determine temperature by measuring the energy coming from your____________.

A.skinB.headC.faceD.foot

【3】The electronic sensors inside the thermometers can measure the heat and read the____________ of the skin.

A.colorB.temperatureC.lightD.structure

【4】Which one of the following might not affect the accurate results?

A.The thermometers is too far from the body.

B.The thermometers is held for very long.

C.Make-up and sweat.

D.The thermometer is held steadily at the right time.

Answer 1

【答案】

【1】C

【2】A

【3】B

【4】D

【解析】

这是一篇说明文，文章介绍红外温度计的使用原理，以及影响测量结果的因素。

【1】

细节理解题。根据第一段“Infrared thermometers, or temperature guns, have been widely used to detect the early symptoms of COVID-19” 可知是检测新型冠状病毒的早期症状，故选C。

【2】

细节理解题。根据第二段“They determine temperature by measuring the energy coming from your skin”测量来自你的皮肤的能量。故选A。

【3】

细节理解题。根据第三段“The electronic sensors inside the thermometers can measure the heat and read the temperature of the skin after making some calculations”可知读取皮肤的体温。故选B。

【4】

推理判断题。根据最后一段“It depend on how these devices are used. For example, how far away they are held from the body, how steadily they are held and for how long. Factors such as make-up and sweat will also affect the results”影响因素有拿得离身体有多远，拿得有多稳当和多长时间；化妆和汗也会影响结果。不影响的是D选项。故选D。