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
2024-02-18
28
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、Masses.
B、Molten lava.
C、Gasses.
D、Unknown substances.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3460287.html
相关试题推荐
[originaltext]M:Soyouworkinapub.W:Yes,that’sright.M:What’sitlike?
[originaltext]M:Soyouworkinapub.W:Yes,that’sright.M:What’sitlike?
[originaltext]W:Hi,Bill,howisitgoing?M:Oh,hi,Jane.I’mOK.Howabout
[originaltext]W:Hi,Bill,howisitgoing?M:Oh,hi,Jane.I’mOK.Howabout
[originaltext]Choosingwhattoeatseemslikeasimpledecision,butvariou
[originaltext]Choosingwhattoeatseemslikeasimpledecision,butvariou
[originaltext]StephenWilliamHawkingwasbornon8January1942inOxford,
[originaltext]StephenWilliamHawkingwasbornon8January1942inOxford,
[originaltext]StephenWilliamHawkingwasbornon8January1942inOxford,
[originaltext](30)Mostschoolsaretryinghardtoupgradetheirlunchprog
随机试题
GeneralIdeasaboutRhetoricI.Thedefinition&unders
Shefeelsitadisgracetospeaktothosesocially_____.A、inferiorB、downC、bel
[originaltext](22)Youcandividetheautomotiveuniverseintotwocategori
Coffeeisapowerfuldrink.Onapersonallevel,ithelpskeepusawakeand
[originaltext]Parentsarebeingurgedtodownloadafreeappwhichtellsth
在基于体系结构的软件设计方法中,采用()来描述软件架构,采用()但来描述功能需求
1.题目:三角形中位线的定理 2.内容: 3.基本要求: (1
《期货从业人员执业行为准则(修订)》是()对期货从业人员进行纪律惩戒的主要
共用题干 男,40岁。金属烤瓷冠修复,适合时发现修复非常密合,经调牙合无早接触
以公允价值为基础计量的非货币性资产交换,换出资产为长期股权投资的,应视同长期股权
最新回复
(
0
)