首页
登录
职称英语
Viewed from a star in some other corner of the galaxy, Earth would be a spec
Viewed from a star in some other corner of the galaxy, Earth would be a spec
游客
2025-04-09
27
管理
问题
Viewed from a star in some other corner of the galaxy, Earth would be a speck, a faint blue dot hidden in the blazing light of our sun. While our neighbors Venus and Mars would reflect a fairly even glow, Earth would put on a little show. Earth’s light would brighten and dim as it spins, because oceans, deserts, forests and clouds-which are all too small to be seen from such a distance—reflect varying arnounts of sunlight. The variations, it turns out, are so strong and distinctive that surprising amount of information could be taken from a simple ebb and flow of light. Scientists at Princeton University andthe Institute for Advanced Study conducted a detailed study of Earth’s reflections as a way for human scientists to learn about distant planets that may be like our own.
"If you looked at our solar system from far away, and you looked at the terrestrial planets—Mercury, Venus, Earth and Mars—one of the quickest ways to see that Earth is unique is by looking at the light curve," said Ed Turner, professor of astrophysics and a co-author of the study. "Earth has by far the most complicated light curve." The standard thinking in the field had been that most of the information about an Earth-like planet would come from spectral analysis, a static reading of the relative component of different colors within the light, rather than a reading of changes over time. Spectral analysis would reveal the presence of gases such as water vapor, carbon dioxide and oxygen, in the planet’s atmosphere, kooking at the change in light over time does not replace spectral analysis, but it could greatly increase the amount of information scientists could learn, said Turner. It may indicate, for example, the presence of weather, oceans, ice or even plant life. [br] Spectral reading of the light reflected by an Earth-like planet_____.
选项
A、can tell us the components of that planet’s atmosphere
B、can locate oceans and forests on that planet
C、can show what the weather on that planet is like
D、is the quickest way to study its light curve
答案
A
解析
本题应选A。大意是:通过Spectral reading可以测得行星的大气成分,这在文章第一段最后一句提到,“Scientists at Princeton University and the Institute for Advanced Study conducted a detalied studyof Earth’s reflections as a way for human scientists to learn about distant planets that may be like ourown.”而选项A、B与文意不符,项D与第二段第一句不符。所以答案是A。
转载请注明原文地址:https://tihaiku.com/zcyy/4032930.html
相关试题推荐
Viewedfromastarinsomeothercornerofthegalaxy,Earthwouldbeaspec
Viewedfromastarinsomeothercornerofthegalaxy,Earthwouldbeaspec
Viewedfromastarinsomeothercornerofthegalaxy,Earthwouldbeaspec
FreeAdviceIsJustAroundtheCornerWhenDanielFrank
FreeAdviceIsJustAroundtheCornerWhenDanielFrank
BackinSeattle,aroundthecornerfromtheDiscoveryInstitute,StephenMeyer
BackinSeattle,aroundthecornerfromtheDiscoveryInstitute,StephenMeyer
Publicimagereferstohowacompanyisviewedbyitscustomers,suppliers,
Publicimagereferstohowacompanyisviewedbyitscustomers,suppliers,
Publicimagereferstohowacompanyisviewedbyitscustomers,suppliers,
随机试题
Whatcanweknowaboutthemanfromtheconversation?[br][originaltext]W:Hey
[originaltext]W:Hey,Robert...goingonvacation?Lookslikeyou’replanning
TheInternetAdvocateA)Contrarytothemannerinwh
【教学过程】 (一)导入新课 同学们,我们知道不同的音乐作品所表达的情感不同,那么,同一作品的不同段落所表达的情感是否也不同呢?带着这个问题,今天我们来
合用哪组药物时,会竞争性地与血浆蛋白结合()A.普鲁卡因、阿曲库铵 B.普
对于国家投资的项目,施工图的建筑面积不得超过初步设计的(),否则必须重新报批。
由自身免疫所导致的疾病是A.类风湿关节炎 B.肢端肥大症 C.大骨节病 D
()基金是既注重资本增值又注重当期收入的一类基金。A.保本型 B.平衡型
《药品经营质量管理规范》的具体实施办法、实施步骤的规定部门是A:国务院药品监督管
2020年,H省全省地区生产总值43443.46亿元,较2019年减少2384.
最新回复
(
0
)