首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The temperature of the Sun is over 5,000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees
The temperature of the Sun is over 5,000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees
admin
2009-06-15
35
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, chromosphere, photosphere, convection zones, 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 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 in 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 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 2 million degree 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.
选项
A、Right
B、Wrong
C、Not mentioned
答案
A
解析
见文章第一句“At the surface,the temperature is over 5,000 degrees Fahrenheit,but it is more than 16 million degrees at the center"。
转载请注明原文地址:https://jikaoti.com/ti/KmJsFFFM
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
UsingHIVVirustoCureCancerScientistsareplanningtousehumanimmunodeficiency(免疫缺陷)virus(HIV),oneofmankind’smos
Inthebeginningofparagraphonewearetoldthatscientistscannotagree______.WhatdoesFeinbergmeanbysaying"Iwouldt
FirstaidmaybringaboutallthefollowingresultsEXCEPTBeforeweadministerfirstaidtoavictim,itisveryimportantfor
15MillionAmericansSufferfromSocialAnxietyDisorderSocialanxietydisorderpreventssome15millionAmericansfromle
DrugReactions--aMajorCauseofDeathAdversedrugreactionsmaycausethedeathsofover100,000UShospitalpatientseach
Dogsaresocialanimalsandwithoutpropertraining,theywillbehavelikewildanimals.Theywillspoilyourhouse,destroyyou
ScreenTest1EveryyearmillionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.Ifthishappensearlyeno
DungtodeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibiotics(抗生素)giventofarmanimals.The
Thefueltankshadacapacityof140liters.
Ourlivesareintimatelyboundupwiththeirs.
随机试题
意愿书的通用类型有()
该病人早期心肺复苏原则
宫颈涂片中癌细胞核特征,哪项是错误的
慢性支气管炎患者的下列表现中,哪项不应使用抗生素
甲公司是一家大型农贸集团企业,通过详细分析,总结出了产业存在如下特征。在这些特征中,不会造成同业竞争激烈的情况是()。
______(油漆成)red,thebuildingstandsoutamongtherestandlooksveryattractive.(paint)
美国心理学家威克曼把学生的问题行为归纳为_________问题行为和心理问题行为。
各级公安机关的法制部门是公安机关法制工作和内部执法监督工作的主管部门,其主要职能包括下列几大类:()。
入世以来,中国加大了和国际市场的融合。金融市场开放让中国不能再像亚洲金融危机时那样______。面对危机,中国沉着冷静,努力将此次冲击化作调整和发展的______。依次填入划横线部分最恰当的一项是()。
表达式"12345"<>"12345"&"ABC"的值是______。
最新回复
(
0
)