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
52
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.
There may be a solid core at the center of the Sun ______.
选项
A、because of the high temperature
B、in spite of the great sight
C、for the temperature is not high enough
D、because the pressures are great
答案
D
解析
本题为细节题。太阳中心可能有固体核心的原因可以参考第一段第三行 “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”,说明固 体核心构成的原因是巨大的压力。因此[D]选项正确。
转载请注明原文地址:https://kaotiyun.com/show/nd5d777K
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
Themanagerwonderedwhy________.Theword"squeak"means________.
【B1】【B12】
Itwas______funtoplayonthebeachthatitattractedcountlesschildren.
Hewilltelluswhyhefeelssostrongthateachofushasarole______inmaltingtheearthabetterplacetoliveon.
Whataretheytalkingabout?
Weweretoldthatweshouldfollowthemainroad______wereachedthecentralrailwaystation.
Whydidthemotheragreetogooutfordinner?
Theactofthinkingandthatoflisteningaresimilarinthat______.Bodymovementsarenecessaryinorderforthelistenerst
Histone______hisrealfeelingsmorethanhiswords.
Whydidn’tthespeakermeetwithMr.Johnsonassoonashearrived?
随机试题
假冒他人专利情节严重的,构成犯罪,要依法追究()
症见腰部疼痛,重着而热,暑湿阴雨天气症状加重,活动后或可减轻,身体困重,小便短赤,苔黄腻,脉濡数,辨证为
关于紫外线消毒的叙述,错误的是
明达期货公司与客户吴伟签订了一份期货经纪合同,但双方未在合同中约定交易结算结果的通知方式,事后也未达成补充规定。某交易日,市场行情突变,吴伟因不知交易结算结果而继续持仓,多造成损失一万元。下列说法正确的是()。
根据《仲裁法》规定,仲裁裁决书自( )发生法律效力。
参与步行活动的肌肉其工作有一定的规律,下列叙述不正确的是()。
解放战争后期,解放区高等教育的发展趋势是
(2008年试题,10)曲线sin(xy)+In(y一x)=x在点(0,1)处的切线方程为__________.
某操作系统的当前资源分配状态如下表所示。假设当前系统可用资源R1、R2和R3的数量为(3,3,2),系统采用银行家算法实施死锁避免策略,以下是安全序列的有()。
Whatisspecialaboutbungeejumping?Fromthepassage,welearnthatthewriter______.
最新回复
(
0
)