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
2012-01-16
18
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 zone, 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 corona is a brilliant, pearly white, firmly 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 weak spikelike 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 speed and reaching a temperature of more than 2 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.
All of the following are parts of the Sun’s atmosphere EXCEPT the ______.
选项
A、photosphere
B、corona
C、chromosphere
D、convection zone
答案
D
解析
本题为细节题。太阳的大气层有三层:光环,色球,光球。对流层属于 太阳的主体部分,因此[D]为正确答案一本题考点是审题,要关注并理 解问题中except的含义。
转载请注明原文地址:https://kaotiyun.com/show/Bd5d777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
【B1】【B20】
AsaresultofthePopRevolution,theyoung______.Theunderlinedword"reserved"inthethirdparagraphprobablymeans____
Wheredoestheconversationtakeplace?
Wheredoestheconversationmostlytakeplace?
Accordingtothepassage,agoodbrandname______.Whichofthefollowingismostimportantinmakingabrandnamepopular?
Whatistheconversationabout?
Thepalacewasheavilyguarded,becauseinsideitswalls______.
ItiscommonlyacceptedinAmericansocietythattoomuchsleepis______.TheresearchdonebytheDementcommissionshowstha
—Doyoulikethe______?—Sure,Ido.Actually,Ihavefour,too.
Mostsmokerswanttostopsmoke.Manyof【76】______themhavetriedmorethanoncebutfailed.【77】
随机试题
血液中缓冲挥发酸最强的缓冲系统是
脊柱旁正中矢状层面的结构特点。
女孩,5岁,患有原发性肺结核,其病理转归最常见的是
关于氧疗,哪一项是错的?
A.砂仁B.豆蔻C.小茴香D.栀子E.蛇床子类球形,黄白色,有3条纵向槽纹,气芳香,味辛凉略似樟脑的药材是()。
杭州甲童装生产厂以“小太阳”为商标,生产童装,因为质量好,样式新,在当地有很大销量,甲童装生产厂于2005年12月1日向商标局寄出注册“小太阳”商标的申请文件,2005年12月5日到达商标局。乙童装生产厂见“小太阳”服装销量好,于是也于2005年12月3日
某公司为增值税一般纳税人,主要生产各种电动工具,适用的增值税税率为17%。增值税以1个月为一个纳税期,自期满之日起15日内申报纳税,增值税专用发票通过防伪税控系统开具。2012年7月10日该公司申报缴纳6月份增值税税款100万元。7月底,税务机关对该公司6
根据《国家赔偿法》的规定。下列各项中不能构成公安刑事赔偿的情形的是()。
在公元之初,牧师们将基督教在整个罗马帝国中传播开来,基督教的普及首先涉及的是各大城市的平民阶层。基督徒们反对皇权意识,因此君主们都把他们视为威胁,并组织起对他们的暴力摧残。然而这并没有中断新信仰的扩展,它一点点赢得了贵族阶级和最有影响力的人士,而且很快触及
燕子去了,有再来的时候;杨柳枯了,有再青的时候;桃花谢了,有再开的时候。但是,聪明的,你告诉我,【C6】______?——是有人偷了他们罢:那是谁?又藏在何处呢?是他们自己逃走了罢,现在又到了哪里呢?我不知道他们给了我多少日子;但我的手确乎是渐
最新回复
(
0
)