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
2025-02-03
28
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:http://tihaiku.com/zcyy/3940894.html
相关试题推荐
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
随机试题
[A]Sheworksinahospital.[B]HeteachesChinese.[C]Bybike.[D]Heisaworke
Itdoesn’tmakeabitof______ifyouarelatetomyparty.Ijustwantyoutoc
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’rem
_____informationisencodedeffectivelyinthememory,itmaynotbeeasilyreca
()海峡时报()国际名人录年刊[br]()基督教科学箴言报()金融时报H
肱骨内上髁后方的一浅沟是A.半月切迹 B.结节间沟 C.冠突窝 D.桡神经
结合有关填石路基的实测项目内容,回答下列有关问题。(1)填石路基采用振动压路机分
表示减毒配伍关系的是A:相须,相杀B:相恶,相须C:相须,相使D:相畏,相
中性点经消弧绕组接地系统,发生单相接地,非故障相对地点压()。 (
2000年以后,我国新股网上发行的具体方式包括()等。A:累计投标询价发行B:
最新回复
(
0
)