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
2024-01-19
37
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] In the last sentence of the third passage, to which of the following does "it" refer?
选项
A、Yellow "hump".
B、Day.
C、Sun.
D、Hydrogen fuel.
答案
C
解析
本题属语意词义题。短文最后一句中it出现在破折号的后面,可从前面追溯到对应的指代对象,即为Sun,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3375445.html
相关试题推荐
"Hightech"and"stateoftheart"aretwoexpressionsthatdescribethemod
"Hightech"and"stateoftheart"aretwoexpressionsthatdescribethemod
"Hightech"and"stateoftheart"aretwoexpressionsthatdescribethemod
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
"Hightech"and"state-of-the-art"aretwoexpressionsthatdescribeverymo
"Hightech"and"state-of-the-art"aretwoexpressionsthatdescribeverymo
"Hightech"and"state-of-the-art"aretwoexpressionsthatdescribeverymo
Ofthose______hadappliedforthejobs,onlytwowereaccepted.A、personsB、tha
随机试题
Theactorwasnotedforhis______behavior:hequicklybecameirritatedifhisev
Countlessexamplesoneducationfailurereinforcedthecognitionthatthereisf
Wehavenegotiatedtheplanofjointventureseveraltimesandhavecometoabe
Ifyouhadtoguesstheorganthathasundueinfluenceonyouremotions,your
在某项目进行的第三个月,累计计划费用是25万元人民币,而实际支出为28万元,以下
创新推动网络育人。拓展网络平台,丰富网络内容,建强网络队伍,优化成果评价,推动网
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
在一般的假设检验问题中,犯第一类错误的概率最大不超过α。( )
( )就是利用有关的信息资料对人的行为进行分析,从而推论其原因的过程。A.内因
研究传染病的传播途径,有利于追踪传染源,控制传染病的发生。 通过粪一口传播的
最新回复
(
0
)