首页
登录
职称英语
[originaltext] Our sun is exactly an orange, dwarf star. Although it is not
[originaltext] Our sun is exactly an orange, dwarf star. Although it is not
游客
2023-07-17
88
管理
问题
Our sun is exactly an orange, dwarf star. Although it is not nearly the hottest star known, the surface temperature is about 10,000°F, and that of its interior is thought to be in the range of 20,000,000°F. We commonly think of the sun as burning; yet it is too hot to burn and is composed of elemental gases.
The sun is more than 865,000 miles in diameter and has a mass one third of a million times greater than the earth’s.Scientists believe that it is two billion years old and, instead of cooling, is still getting hotter. Perhaps, within next two billion years, it will reach a temperature of sufficient intensity to destroy the earth.
The sun’s halo is almost as hot as its interior. Its tongues of fire leap outward a half-million miles from the sun’s surface at speeds reaching 250,000 miles an hour. Fortunately these tongues do not travel at their full speeds to earth ,nor are their terrific temperatures transmitted through space. Some of the energy from these disturbances does reach our atmosphere ,however, and is believed to changes in weather.
选项
A、It’s a well-known fact.
B、It’s a common assumption.
C、It’s an unfounded theory.
D、It’s a scientific belief.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2844024.html
相关试题推荐
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
[originaltext]Oneofthefirstquestionsanybodyasksaboutanew-bornis“what
[originaltext]Oneofthefirstquestionsanybodyasksaboutanew-bornis“what
[originaltext]M:Howdidyoudoontheexam?W:Ipassed,butIdidn’tdotoo
[originaltext]M:Afineday,isn’tit?W:Yeah.Howiseverythinggoing,Mike?
[originaltext]M:ProfessorJohnson’slectureissoboring.Idon’tthinkit’su
[originaltext]M:ProfessorJohnson’slectureissoboring.Idon’tthinkit’su
[originaltext]M:ProfessorJohnson’slectureissoboring.Idon’tthinkit’su
[originaltext]M:ProfessorJohnson’slectureissoboring.Idon’tthinkit’su
随机试题
(61)Apple’sIpadmaybelatestandgreatesttechgadget,butoddlyenough,
(1)TheBoyScoutsofAmerica(BSA),thelargestyouthorganizationintheUni
[originaltext]M:GoodMorning,SallyLeung.W:GoodMorning,thankyou.1sith
ManyChinesestudentswantto【B1】______theirMaster’sorPh.D.’sdegreei
中国长城,世界奇迹之一,在1987年被联合国教科文组织(UNESCO)列为世界遗产。长城就像一条巨龙,蜿蜒曲折,横跨沙漠、草原、高山和高原,从东向西绵延
资产负债表的报告时点通常不包括( )。A.月末 B.会计季末 C.半
痰湿阻滞所致闭经的临床特点是A.月经停闭,肢倦神疲,食欲不振,大便溏薄 B.月
多油断路器()不合格,试验数据严重超标,无法继续运行的定为危急 缺陷。(A
2011年该市城市居民平均每个季度的工资性收入是()元。 A.6075
蛋白质变性后的主要表现是A.黏度降低 B.溶解度降低 C.颜色反应减弱 D
最新回复
(
0
)