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
91
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、About 10,000 °F.
B、About 20,000,000°F.
C、About 2,000,000°F.
D、About 20,000°F.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2844022.html
相关试题推荐
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
[originaltext]Oneofthefirstquestionsanybodyasksaboutanew-bornis“what
[originaltext]Oneofthefirstquestionsanybodyasksaboutanew-bornis“what
[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
Inoursociety,wemustcommunicatewithpeople.Agreatdealofcommunicat
细部工程各分项的检验批应按下列规定划分()。A.同类制品每50间(处)应划分为
1型糖尿病的发病是由于A.胰岛素分泌绝对不足B.胰岛素相对不足以及靶细胞对胰岛素
在颌面发育的快速期中,第一恒磨牙萌出是第几快速期:()A.一 B.二
保证中药质量的前提是A.栽培条件B.采收加工C.产地D.土壤E.品种正确
财务会计报告能够提供有助于()进行合理决策的信息。A:投资者 B:管理当局
(2018年)根据《测绘地理信息行业信用指标体系》,某丙级测绘资质单位因市场不正
新安装或A及B类检修后投运的断路器及长期停用的断路器投入运行()小时内,应增
爱因斯坦曾说过,“我评定一个人的真正价值只有一个标准,即看他在多大程度上摆脱了‘
成釉细胞瘤内含有A.血性液体 B.黄褐色液体 C.透明、淡黄色水样液体 D
最新回复
(
0
)