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
2014-04-23
47
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/l6WO777K
0
在职攻硕英语联考
相关试题推荐
Thousandsofpeople______fromGreeceeveryyeartoworkinWestGermany.
Butforhispoverty,he______morestudentslivinginthepovertystrickenareastogotouniversities.
Thedegreeofeconomicgrowthisan______ofthelevelofliving.
Webbrowsers!Interactivesoftware!There’salotofnewtechnologytalkgoingoninpublicrelationsthesedays,andit’scomin
TheMITSloanSchoolofManagementstronglybelievesthatitspurposeistogivestudentsthetoolstheywillneedtobeeffecti
Thereportproposesthatstudentsbeallowedtoworkofftheirdebtthroughcommunityservice.
Itbeganasjustanotherresearchproject,inthiscasetoexaminetheeffectsofvariousdrugsonpatientswithaseveremoodd
Evenduringthehorseandcarriagedays,trafficinbigcitieswasoftenheavy.Policeofficershadtobestationedfulltimedi
Thereisnodoubtthatairpollutionisaglobalcrisis:itcausesanannualdeath【C1】______of6.5million.Thatisdoublethet
Thereisnodoubtthatairpollutionisaglobalcrisis:itcausesanannualdeath【C1】______of6.5million.Thatisdoublethet
随机试题
对“永远快乐”这句话,钱钟书说“不但渺茫得不能实现,并且荒谬得不能成立”是因为()
某刺绣厂女工李某因其绣工好,深受客户喜爱。许多爱刺绣的客户慕名前来向其定作绣品。某年,港商向其一次性订购10幅绣品,每幅1000元,言明1年后取货,并预付了5000元定金。李某因当年家中杂事太多,就把活儿分给本厂几名女工合干,言明到时货钱平分。1年后,货款
汉文帝曾下诏废除肉刑,进行刑制改革。下列关于汉文帝刑罚改革的说法中,()是正确的。
关于对格式条款的解释,以下错误的是()。
某市一录像放映厅在开业前,公安消防机构对其防火设施条件进行检查并通过。开业后不久,该录像厅负责人为了扩大营业面积,擅自对录像厅进行了改建,改建过程中将原有的紧急出口封闭。同时,由于该录像厅经常违法播放一些黄片,为了掩人耳目,在播放时经常从外面把门锁上。对该
根据事故具体情况,事故调查组成员由有关人民政府、安全生产监督管理部门和负有安全生产监督管理职责的有关部门以及()派人参加。
课堂心理气氛主要有三种类型:积极的、消极的与()
请设计一节课的教案,达到以下目的:(1)学生能够通过组织乐队进行演唱来听说读写某些词汇。(2)培养学生运用英语的能力。
下列关于地震自救表述正确的是()。
VisualBasic控件一般都规定一个默认属性,在引用这样的属性时,只写对象名而不必给出属性名。默认属性为Caption的控件是
最新回复
(
0
)