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
自考
When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important sing
When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important sing
admin
2013-07-02
33
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 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 bloodred dwarfs so cool that their surface temperature is a mere 4,000 degrees Fahrenheit, there are searing 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 day will change accordingly. 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.
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 has a short history.
D、It is too cold.
答案
A
解析
细节题。“作者认为目前太阳特别重要的一点是什么?”A选项“它显示为黄色”。文中说and this means that...band of,the spectrum,可见这一项是正确答案。B选项“它总是保持不变”;C选项“它的历史较短”;D选项“它太冷了”。
转载请注明原文地址:https://jikaoti.com/ti/InVaFFFM
本试题收录于:
英语阅读(一)题库文史类分类
0
英语阅读(一)
文史类
相关试题推荐
Itbeganasagame:highschoolandcollegestudentsstudyingcomputertechnologyfiguredouttheycouldusepersonalcomputers
WhatthreathavehackersposedtotheAmericangovernment?Howthegovernmentdealwiththeseproblems?
Isasecondlanguagenecessaryininternationalbusiness?Why?
Actually,hedidlikesomething:hisbusiness.(63)Theproblemwasthatwhilehewasstillafabulouslywealthyman,hehadrec
Actually,hedidlikesomething:hisbusiness.(63)Theproblemwasthatwhilehewasstillafabulouslywealthyman,hehadrec
Severalyearslater,IheardthatJerrydidsomethingyouareneversupposedtodoinarestaurantbusiness;heleftthebackdo
Severalyearslater,IheardthatJerrydidsomethingyouareneversupposedtodoinarestaurantbusiness;heleftthebackdo
Beautyhasalwaysbeenregardedassomethingpraiseworthy.Almosteveryonethinksattractivepeoplearehappierandhealthier,h
Whenyou’renegotiatingwithsomeone,listenforthemessagesthatheorshemightbesendingtoyou.Forexample,theword"di
FortheRomantics,isnotonlythemajorsourceofpoeticimagery,butalsoprovidesthedominantsubjectmatter.()
随机试题
在历史上享有“佛画之祖”的大画家是()
下列关于股动脉描述哪项是正确的
手足心汗出量多是因为
A、亚硝酸钠滴定法B、硝酸银滴定法C、紫外分光光度法D、荧光分析法E、高效液相色谱法以下药物的含量测定方法为复方磺胺甲噁唑片
与司法相比较,执法主要具有的特征是什么?
【2015年真题】投资方案财务生存能力分析,是指分析和测算投资方案的()。
美国的证券市场是从买卖()开始的。
中国十大传世名画完成于元代的是()
某专家就目前多方对支线航空安全性的质疑发表声明,他表示,支线飞机所执行的安全标准,与波音、空客大飞机基本一致,大小飞机结构强度也是一样的。乘客感觉支线飞机颠簸,干线飞机平稳,是因为飞机越大,抗干扰能力就越强,所以感觉干线飞机平稳。事实上,支线飞机和干线飞机
教育活动与其他社会活动最根本的区别在于()。
最新回复
(
0
)