首页
登录
职称英语
When we accept the evidence of our unaided eyes and describe the Sun as a y
When we accept the evidence of our unaided eyes and describe the Sun as a y
游客
2025-03-15
44
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 radia-tion 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 de-grees 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.
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 sec-ond-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/3998030.html
相关试题推荐
WhenweaccepttheevidenceofourunaidedeyesanddescribetheSunasay
WhenweaccepttheevidenceofourunaidedeyesanddescribetheSunasay
Ifhehadapplied(byAugust)15,theuniversity(hadaccepted)(him)(this)sem
Pleasegivehisdecisionplentyof______beforeyouacceptit.A、conclusionB、th
______Iacceptthatheisnotperfect,Idoactuallyliketheperson.A、WhileB、
______andhappy,Tonystoodupandacceptedtheprize.A、SurprisingB、Surprised
IfhehadappliedA(byAugust)15,theuniversityB(hadaccepted)C(him)D(this)
Auniversitygraduatedescribedasa"respectableandintelligent"womanis
Auniversitygraduatedescribedasa"respectableandintelligent"womanis
Auniversitygraduatedescribedasa"respectableandintelligent"womanis
随机试题
[originaltext]Forthoseofyouwhowerebornintheyearofthepig,goodl
Accordingtothespeaker,whatisthesolutiontopreventexcessivepraiseandcr
患者,女性,30岁。已婚。主诉一周来外阴瘙痒,白带增多,稀薄,脓血性有异味。妇科
演出行业主管部门、剧院和演出院团应建立演出安全管理制度,并对剧院,演出院团和演出
基金管理人以及依法取得基金代销业务资格的其他机构,可以依法办理开放式基金份额的(
下列各项,不属于观察苔质的内容是()A.燥苔 B.厚苔 C.腐苔 D
( )是我国最早开办、规模最大的个人贷款产品。A.个人商业用房贷款 B.个人
对于装设有自动投切装置的电容器,在(____)操作前,应确保自动投切装置已退出,
各托管银行应对基金托管业务技术系统进行数据备份,这是其()特征的体现。A:主要托
使用IC卡进行劳务实名制管理可实现的管理功能有()。A.人员信息管理 B.门
最新回复
(
0
)