题目内容
Yancheng is a beautiful city that lies in ________ east of China.
A.a B.an C.the D./
Though he never held a high _______ in the government, the poet still cared about common people.
A.condition B.position C.education D.situation
The 3rd China's Got Talent (中国达人秀) gives the child a chance to show his special________.
A.ability B.behavior
C.education D.background
— Mary, could you tell me ________ this novel?
— Oh, I bought it on the Internet last Sunday.
A.where did you buy B.where will you buy
C.where you bought D.where you will buy
David ________so hard. He is always the first to come and the last to leave.
A.will work B.works C.worked D.was working
After Jack cleaned the classroom, Jack went home. (改为同义句)
Jack____________ go home____________ Jack cleaned the classroom.
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.skin B.head C.face D.foot
3.The electronic sensors inside the thermometers can measure the heat and read the____________ of the skin.
A.color B.temperature C.light D.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.
can, get, how, we, there
______________________________________________________________?
If you want to buy this T-shirt, You’d better ________first to make sure it fits you.
A.pay for it B.take it off C.tidy it up D.try it on