首页
登录
职称英语
Computers may one day turn night into day—with good old, natural sunlight.
Computers may one day turn night into day—with good old, natural sunlight.
游客
2025-03-24
24
管理
问题
Computers may one day turn night into day—with good old, natural sunlight.
Colossal computer-controlled mirrors, thousands of feet across, may one day orbit the earth, reflecting sunlight onto a darkened United States.
Some scientists say that 16 of these mirrors, each about a half mile across, could aim their reflected light at one area on the earth that was about 200 miles by 300 miles. That much light would equal about 56 moons.
The mirrors would be so high that they could catch the sun’s light as it was shining on the other side of the earth. The mirrors could orbit—thousands of miles high—at the same speed as the earth turns on its axis. That way, the mirrors would always be over the same spot. The aluminium-coated, plastic mirrors could be folded up and packed into a spaceship, according to the scientists. Once released a few hundred miles in space, the mirrors, powered by a solar-powered engine, could make the rest of the trip into space on their own.
The scientists say that the computer-controlled mirrors could also be made to tilt slowly so the reflected sunlight would sweep slowly along the surface of the earth. For example, as night fell, the mirrors could be tilted to light up Boston. Later on, as darkness spread slowly westward, Chicago, for example, then San Francisco could be lit up. The reflected sunlight would allow these cities to save up electricity. And in emergencies, such as power-failures, the mirrors could light up the affected area.
What no one knows yet is what effect this artificial daytime would have on plants, animals, and humans. Would it confuse some animals and harm plants that are used to regular day-night cycles? The scientists recommend that studies be done to find out what bad effects there might be. [br] The purpose for turning night into day is to______.
选项
A、confuse animals and plants
B、light up more cities
C、save energy and deal with emergencies
D、enable people to work longer hours
答案
C
解析
本题问人们将夜晚变成白昼的目的是什么。根据文章第五段内容,反射的阳光可使这些城市节约用电。如果遇到类似停电这样的紧急情况,可以给这些事故地区照明。因此,本题的正确答案应是C“节约能源和应付紧急情况”。
转载请注明原文地址:https://tihaiku.com/zcyy/4010903.html
相关试题推荐
Computersarealreadywidelyusedinindustryandinuniversitiesandthetimem
TherabbithadnonaturalenemiesinAustralia______.A、andasaresultitmultip
Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.
Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandn
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Weareallnaturallyattractedtopeoplewithideas,beliefsandinterestsl
随机试题
Duringthepasttenorfifteenyearsagreatdealofattentionhasbeen【C1】_
[originaltext]M:Okay.MayIseeyourdriver’slicenseplease?W:What?DidId
AhugelywealthywifeissuingTheRitzinLondonaftershelost£2million
Planningisaveryimportantactivityinourlives.Itcangive【C1】______,
作业开始第一次吊重物时,应在吊离地面()mm时停止,检查倒链制动情况,确认完好
肥胖三级预防的最主要目的是()A.为了美观 B.预防糖尿病 C.预防慢性
固定桥金属基底试戴时如果与基牙不密合而出现翘动,则处理办法为()A.
某投资人将所持有的x证券投资基金转换成Y证券投资基金,假定T日的X基金份额净值为
某省辖区某市市区内发现的古文化遗址被确定为全国重点文物保护单位,则其建设控制地带
在土地增值税清算过程中,发现纳税人符合核定征收条件的,其核定征收率不低于()。
最新回复
(
0
)