首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Computers may one day turn night into day—with good old, natural sunlight. Colossal computer-controlled mirrors, thousands o
Computers may one day turn night into day—with good old, natural sunlight. Colossal computer-controlled mirrors, thousands o
admin
2012-07-17
84
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.
The reflected light would sweep slowly along the surface of the earth because the mirrors
选项
A、would be operated by solar-powered engines
B、could be made to adjust their angles
C、could move around the earth at the same speed as the earth turns on its axis
D、would orbit thousands of miles high to catch the sun’s light
答案
B
解析
本题是一道具体细节题。问反射的太阳光线可以慢慢扫过地球表面的原因是什么。文章第五段指出,科学家们说,计算机控制的镜面还可以缓慢倾斜,使反射的阳光缓慢地沿地球表面扫过。比如,当夜幕降临时,经倾斜的镜面可以照亮波士顿,稍后,随着夜色的逐渐西移,可照亮芝加哥,然后照亮旧金山。因此,本题的正确答案应是B“因为这些反射镜可以调整其倾斜角度”。
转载请注明原文地址:https://kaotiyun.com/show/8bXO777K
0
在职攻硕英语联考
相关试题推荐
Thepresidentexplainedthatthepurposeoftaxationwasto______governmentspending.
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfult
Bigcitiestodayareconfrontedwithveryseriousproblems.Transportisa【C1】______difficulty:someplannersbelievein【C2】____
Peoplethinkingabouttheoriginoflanguageforthefirsttimeusuallyarriveattheconclusionthatitdevelopedgraduallyas
Today,theTowerofLondonisoneofthemostpopulartourist【C1】______andattractso-verthreemillionvisitorsayear.Itwas
TheclashbetweenRealMadridandArsenalisbeing______asthematchoftheseason.
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【C1】______hebelievedthati
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【C1】______hebelievedthati
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【C1】______hebelievedthati
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【C1】______hebelievedthati
随机试题
Supposewebuiltarobot(机器人)toexploretheplanetMars.Weprovidetherobotwithseeingdetectorstokeepitawayfromdange
精浆中有助于前列腺疾病诊断的成分是
目前认为志贺菌致病必须具备的条件是()
张、王、李、赵4人成立某合伙企业,合伙协议中未对经营期限作出规定。后赵认为合伙企业效益不好,想自己另外开立一家个人独资企业,因此希望退出合伙。则需要满足什么条件,赵才可以合法退伙?()
下列风险中,属于房地产投资系统风险的有()。[2009年考题]
简述小学生品德发展的基本特征。
党的十八大报告提出,要坚持中国特色反腐倡廉道路,坚持标本兼治、综合治理、惩防并举、注重预防方针,做到干部清正、政府清廉、政治清明。党坚定不移地反腐的目的在于()。①履行国家职能,全面建设小康社会②落实全心全意为人民服务的宗旨,
对“韩愈在《进学解》里发挥这个意思”一句中“这个意思”的理解正确的一项是:对下面句子在语段中的作用所作的分析,正确的一项是:其实这种“气”与“趣”,不只在自然中可以见出,在一般人生世相中也可得到。
如果臭氧在空气中的数量达到一定浓度之后,就会对人体造成严重的伤害。当人吸入臭氧的时候,臭氧就会因为其强氧化作用而使呼吸道产生烧灼感。造成呼吸系统充血或发炎,儿童、老人和患有呼吸道疾病的人受到臭氧的伤害尤为严重。据专家统计,在欧洲臭氧污染导致欧洲人的死亡率增
______(你一给某人发送私人信息)thanitappearedonthatperson’sscreen.
最新回复
(
0
)