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
2025-07-25
12
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, 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. [br] 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://tihaiku.com/zcyy/4176501.html
相关试题推荐
Thetemperaturein______areawillofcoursepartlybedeterminedbyhowfarit
Weatherchangeswhenthetemperatureandtheamountofwaterintheatmosphe
Weatherchangeswhenthetemperatureandtheamountofwaterintheatmosphe
ThetemperatureoftheSunisover5,000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5,000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5,000degreesFahrenheitatthesurface,
ThetemperatureoftheSunisover5,000degreesFahrenheitatthesurface,
IstheaveragetemperatureofShenyanginsummer______?A、likeChicagoB、likeit
TemperaturesintheUnitedStates______measuredaccordingtotheFahrenheitSc
IstheaveragetemperatureofBeijinginsummer______?A、likeChicagoB、likeiti
随机试题
Eachoftheninesquaresmarked1Ato3Cinthegridshouldincorporateallthe
A.反竞争性抑制 B.非竞争性抑制 C.两者都是 D.两者都不是
下列选项中属于只引起会计等式左边会计要素变动的经济业务有()。A.购买材料800
在支付过程中,消费者选择付款方式、确认订单、签发付款指令时,()开始介入。A.
APT理论的创始人是()。A.马柯威茨 B.威廉 C.林特
具有明显季节性的邪气是A.湿邪 B.暑邪 C.燥邪 D.风邪 E.火邪
2017年12月15日,甲公司与乙公司签订具有法律约束力的股权转让协议,将其持有
六淫邪气中,具有“重浊”特点的是A.风 B.寒 C.暑 D.湿
按使用性质分,地下室可分为普通地下室和()。A:人防地下室B:全地下室C:
(2016年真题)下列各项中,不属于周转材料核算范围的是()。A.生产过程中所
最新回复
(
0
)