首页
登录
职称英语
The temperature of the Sun is over 5 000 degrees Fahrenheit at the surface,
The temperature of the Sun is over 5 000 degrees Fahrenheit at the surface,
游客
2025-03-24
4
管理
问题
The temperature of the Sun is over 5 000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees at the center. The Sun is so much hotter than the Earth that matter can exist only as a gas, except at the core. In the core of the Sun, the pressures are so great against the gases that, despite the high temperature, there may be a small solid core. However, no one really knows, since the center of the Sun can never be directly observed.
Solar astronomers do know that the Sun is divided into five layers or zones. Starting at the outside and going down into the Sun, the zones are the corona (日冕, 光环层),chromosphere (色球层),photosphere (光球层),convection zone(对流层),and finally the core. The first three zones are regarded as the Sun’s atmosphere. But since the Sun has no solid surface, it is hard to tell where the atmosphere ends and the main body of the Sun begins.
The Sun’s outermost layer begins about 10 000 miles above the visible surface and goes outward for millions of miles. This is the only part of the Sun that can be seen during an eclipse (日 食) such as the one in February, 1979. At any other time, the corona can be seen only when special instruments are used on cameras and telescopes to shut out the glare of the Sun’s rays.
The corona is a brilliant, pearly white, filmy light, about as bright as the full Moon. Its beautiful rays are a sensational sight during an eclipse. The corona’s rays flash out in a brilliant fan that has wispy (纤细的) spike-like rays near the Sun’s north and south poles. The corona is thickest at the Sun’s equator.
The corona rays are made up of gases streaming outward at tremendous speeds and reaching a temperature of more than two million degrees Fahrenheit. The rays of gas thin out as they reach the space around the planets. By the time the Sun’s corona rays reach the Earth, they are weak and invisible. [br] According to the passage, as the corona rays reach the planets, they become______.
选项
A、darker
B、weaker
C、cooler
D、clearer
答案
B
解析
本题是一道具体细节题。问按照文章内容,随着光环层光线接近行星,它们会变得怎样。文章最后一段指出,光环层的光线由高速外流气体组成,其温度可达200万华氏度以上。气浪光线在到达行星周围空间时,逐渐减弱。当太阳光环带的光线到达地球时,强度减弱,光线便看不到了。因此,本题的正确答案应是B“光线逐渐减弱”。
转载请注明原文地址:https://tihaiku.com/zcyy/4010703.html
相关试题推荐
______fromspace,ourearth,withwatercovering70%ofitssurface,appearsa"
ThetemperatureoftheSunisover5000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5000degreesFahrenheitatthesurface,
【B1】[br]【B5】A、tidesB、degreesC、statusD、ranksBtitle标题。题目,头衔;status身份,状况;ran
AsNASApreparestosettwinrobotslooseontheMartiansurfaceandmakesp
SpeakerA:What’stherateforsendingapackageofbookssurfacemailtoJapan?
The______temperatureofahumanbody,nomatterinwhatpartoftheworldheliv
Ithasbeenestimatedthattheearth’ssurfacetemperaturehasincreased______on
随机试题
Parisislikepornography.Yourespondevenifyoudon’twantto.Youturna
目前世界上还存在着种族歧视、政治冲突和国家间的领土纠纷(therebe)Atpresentthereisstillracialdiscrimi
I’msorry,butIhaveaquestionto______you.A、treatB、influenceC、askD、change
Whenexportinggoods,itisessentialtoarrangeinsurancecoverincasethegoo
对著作权侵权行为人的行政处罚包括( )等。A.罚款 B.没收违法所得 C.
《公路桥梁承载能力检测评定规程》规定,对符合下述条件,如()的在用桥梁,可通过
依据《建筑内部装修设计防火规范》,下列做法中不符合要求的是()。A.安装在金属
案例六: 一般资料:求助者,女性,29岁,工人 案例介绍:求助者结婚两年,因
信息出现的顺序对印象形成有重要影响,反映在()。单选A.光环效应 B.刻
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)