首页
登录
职称英语
As viewed from space, the Earth’s distinguishing characteristics are its blu
As viewed from space, the Earth’s distinguishing characteristics are its blu
游客
2024-01-02
48
管理
问题
As viewed from space, the Earth’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million km (93 million miles), the Earth is the third planet from the Sun and the fifth largest planet in the solar system. Its rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled with the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Most meteors burn up in the Earth’s atmosphere before they can strike the surface. The planet’s active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it was formed. The Earth has a single natural satellite -- the Moon. [br] What two factors help protect the Earth from radiation?
选项
A、Magnetic field and atmosphere.
B、Rapid spin and molten iron-nickel core.
C、The Sun and the Moon.
D、Blue waters and white clouds.
答案
A
解析
见文中第四句:Its rapid spin and molten nickel-iron core give rise to an extensive magnetic field which,coupled with the atmosphere,shields us from nearly all of the harmful radiation coming from the Sun and other stars.地球快速的自转以及其熔融的镍铁地核引发了广泛的磁场,再加上大气层,保护我们免受来自太阳及其他星体的几乎所有的有害辐射。由此我们得出:帮助地球免受辐射的两个因素是A.“磁场和大气层”。
转载请注明原文地址:https://tihaiku.com/zcyy/3326334.html
相关试题推荐
"Characteristicssuchasthesize,growthandcomplementarityoftheChineseeco
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
随机试题
AmongthegreatMiddleEnglishpoets,GeoffreyChaucerisknownforhisproducti
Oneofthemostimportantfeaturesthatdistinguishreadingfromlisteningi
MOLLIFY:A、instigateB、instillC、ireD、subsideE、combatC
RobertBrowning’sprincipalachievementliesinhisintroducingtoEnglishpoetr
Thetrulyincompetentmayneverknowthedepthsoftheirownincompetence,a
除《哲学的贫困》外,标志马克思主义公开问世的经典著作是()A.《关于
真菌人工培养的条件,正确的是A.培养基中必须含有丰富的营养物质 B.最适pH7
下列关于勘察与设计的说法,正确的有()。A、建设工程的勘察与设计是两类性质相近但
根据《中华人民共和国放射性污染防治法》,核设施营运单位应当建立健全安全保卫制度,
(2021年真题)下列条件中,属于线性盈亏平衡分析模型假设条件的有()A.
最新回复
(
0
)