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
2025-03-18
14
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 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://tihaiku.com/zcyy/4002910.html
相关试题推荐
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Thiscountryisfullycommittedtotheintroductionofcomputersintoschool
Weareallnaturallyattractedtopeoplewithideas,beliefsandinterestsl
Weareallnaturallyattractedtopeoplewithideas,beliefsandinterestsl
Weareallnaturallyattractedtopeoplewithideas,beliefsandinterestsl
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandn
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandn
Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.
Computersmayonedayturnnightintoday—withgoodold,naturalsunlight.
随机试题
管道第二次冲洗应在第一次冲洗后,用有效氯离子含量不低于()mg/L的清洁水浸泡
移动式操作平台的面积不应超过(),高度不应超过(),高宽比不应大于(),施
对于SMA混合料,析漏试验是确定其沥青用量的一种辅助试验方法。()
地方性斑疹伤寒的病原体是A、恙虫病立克次体 B、伤寒杆菌 C、莫氏立克次
5周岁小儿的血压应为A:70/50mmHg B:80/60mmHg C:90
商业银行收回现金主要渠道有()。A:储蓄存款现金收入 B:商品销售的现金收入
共用题干 TheToughGrassThatSweetensOur
左旋多巴治疗肝昏迷的机制是A.进入脑组织,直接发挥作用 B.在肝脏脱羧生成多巴
下列爆炸属于物理爆炸的是()。A.汽油受热爆炸 B.面粉爆炸 C.核爆炸
选择建筑智能化产品主要考虑( )等信息。A.产品的品牌和生产地 B.产品支持
最新回复
(
0
)