首页
登录
职称英语
When we accept the evidence of our unaided eyes and describe the Sun as a ye
When we accept the evidence of our unaided eyes and describe the Sun as a ye
游客
2025-03-09
27
管理
问题
When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important single fact about it—at this moment in time. It appears probable, however, that sunlight will be the color we know for only a negligibly (微不足道的) small part of the Sun’s history.
Stars, like individuals, age and change. As we look out into space, we see around us stars at all stages of evolution. There are faint blooded dwarfs so cool that their surface temperature is a mere 4, 000 degrees Fahrenheit; there are scaring ghosts blazing at 100, 000 degrees Fahrenheit and almost too hot to be seen, for the great part of their radiation is in the invisible ultraviolet range. Obviously, the "daylight" produced by any star depends on its temperature; today (and for ages to come) our Sun is at about 10, 000 degrees Fahrenheit, and this means that most of the Sun’s light is concentrated in the yellow band of the spectrum, falling slowly in intensity toward both the longer and shorter light waves.
That yellow "hump" will shift as the Sun evolves. and the light of the day will change accordingly. (80)
It is natural to assume that as the Sun grows older, and uses up its hydrogen fuel—which it is now doing at the spanking rate of half a billion tons a second—it will become steadily colder and redder.
[br] What does the author say is especially important about the Sun at the present time?
选项
A、It appears yellow.
B、It always remains the same.
C、It had a short history.
D、It is too cold.
答案
A
解析
本题属细节判断题。根据题目中的important about the Sun at the present time找到短文的对应处,即第一段的开头When we accept the evidence of our unaided eyes and describe the Sun as a yellow star,we have summed up the most important single fact about it.—_at this moment in time.可从这句话得知,作者认为我们肉眼见到的是黄色星球——太阳这一现象在当前来讲是极为重要的。
转载请注明原文地址:https://tihaiku.com/zcyy/3990004.html
相关试题推荐
【B1】[br]【B19】A、knowledgeB、cluesC、evidenceD、suggestionsB本题考查上下文的词义判断。从这些谈话中
【B1】[br]【B18】A、possibleB、advisableC、acceptableD、desirableB词义辨析。possible意为“
HespokesoquicklythatIdidn’t______whathesaid.A、receiveB、acceptC、liste
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemst
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemst
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemst
"Green-eyed"canbeusedtodescribesomeonewhois______ofothers.A、youngB、sho
随机试题
Onewomanwhochewedwithhermouthopenandgaveeveryonecruelnicknameshadl
[originaltext]MySpace,thesocialnetworkingwebsite,isdifferentfromoth
TheU.S.dollarwassupposedtobeattheendofitsrope.Kickingthebucke
则|A+B|的值为()。A.3 B.4 C.5 D.6
根据《证券公司监督管理条例》第二十六条的规定,( )个以上的证券公司受同一单位
有降压作用的中药成分是A.麝香酮B.麻黄碱C.N-甲基酪胺D.泽泻醇E.茯苓多糖
根据概算文件的质量要求,概算负责人、审核人和审定人应由( )担任。 A、国家
下列说法正确的是()A.2004~2008年进口呈逐年增大趋势 B.
企业工会(雇员)代表与企业(雇主)代表依法就企业内部工资分配制度、工资分配形式、
2009年10月,王旗镇村民王某夫妇未取得准生证生育了第二胎,同年11月,受县计
最新回复
(
0
)