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
62
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 word "colossal" in Line 2 most likely means______.
选项
A、giant
B、orbiting
C、nuclear-powered
D、spinning
答案
A
解析
本题是一道词汇含义类问题。问文章第二行中的词colossal是什么意思。根据文章上下文,由计算机控制的这种巨型反射镜,直径达数千英尺,将来会环绕地球运行,把阳光反射到夜幕笼罩的美国。由其直径可达数千英尺,我们可以推断出本词的含义是“巨大的”。因此,本题的正确答案应是A。
转载请注明原文地址:https://www.kaotiyun.com/show/fbXO777K
0
在职攻硕英语联考
相关试题推荐
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsidertherole
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsidertherole
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsidertherole
Bigcitiestodayareconfrontedwithveryseriousproblems.Transportisa【C1】______difficulty:someplannersbelievein【C2】____
TheJapanesedesireformarriagehadbeenverystrong.Inthefifth""worldyouthattitudesurvey""【C1】______bytheManagementa
TheJapanesedesireformarriagehadbeenverystrong.Inthefifth""worldyouthattitudesurvey""【C1】______bytheManagementa
Today,theTowerofLondonisoneofthemostpopulartourist【C1】______andattractso-verthreemillionvisitorsayear.Itwas
Apervasivenegativeattitudeoftheengineerstowardprojectsfundedbyhiscompanyisthecauseofthedelayofsigningtheco
Ifyouwantto______apleasantvisit,findoutasmuchaspossibleaboutthemannersandcustomsofyourhostcountry.
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【C1】______hebelievedthati
随机试题
商业银行在计算资本充足率时,应当从核心一级资本中全额扣除()。
分离器在开入孔检查、清掏污物、装好入孔盲板后,应对分离器()。
在西方文论史上,将19世纪的现实主义定名为“批判现实主义”的作家是【】
破伤风抗毒素皮试液的标准是每1ml皮试液含破伤风抗毒素()。
患者,男,68岁,风湿性心脏瓣膜病,二尖瓣狭窄10余年。3天前受凉后出现咳嗽,咳黄色黏痰,伴发热,体温最高为38.3℃,伴胸闷、心悸气短,上5层楼梯需要中间休息5分钟,自服感冒药后未见改善,急诊以“风湿性心脏瓣膜病、心力衰竭、肺部感染”收入院。引起该患
全口义齿修复时垂直距离是指
材料一禾丰造纸厂是我国最早的民族造纸企业之一。1923年,褚辅成与友人筹资36万元,在嘉兴南湖畔创办,主要生产黄纸板卷筒,这是嘉兴市区最早的机器工业。但是,日商凭借其免税的权利压价倾销,黄纸板价格暴跌。禾丰厂大量积压,到1927年底,负债达60万元。不得已
2016年年末我国总人口138271万人,比上年末增加809万人,其中城镇常住人口79298万人,占总人口比重(常住人口城镇化率)为57.35%,比上年末提高1.25个百分点,户籍人口城镇化率为41.2%,比上年末提高1.3个百分点。全年出生人口1786万
Tasteissuchasubjectivematterthatwedon’tusuallyconductpreferencetestsforfood.Themostyoucansayaboutanyone’sp
A、Thetriflesofdailylife.B、Thebasicsofrelationships.C、Thestandardsofrelationships.D、Thefeelingsofromanticgesture
最新回复
(
0
)