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
2024-01-01
31
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 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] Approximately how much of the Earth’s atmosphere is nitrogen?
选项
A、One-fourth
B、One-half
C、Three-fourths
D、All of it
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3325511.html
相关试题推荐
Theflavorofcoffeewill______onthecharacteristicsofthebean.A、dependB、dep
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Asviewedfromspace,theEarth’sdistinguishingcharacteristicsareitsblu
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
Becauseearlymanviewedillnessasdivinepunishmentandhealingaspurifica
随机试题
[originaltext]M:ThatistheworstpaintingI’veeverseen.W:Comeon.It’sno
[originaltext]Onlyafewyearsago,a"weblog"wasalittle-knownwayofk
激素的传递方式有A.远距分泌 B.神经分泌 C.旁分泌 D.外分泌
血瘀而崩者,常选用A.三七注射液 B.参附注射液 C.生脉注射液 D
变电站工程投运前1个月,运维单位应配备足够数量的仪器仪表、工器具、安全工器具、备
(2018年真题)外保温系统与基层墙体、装饰层之间无空腔时,建筑外墙外保温系统的
(2015年真题)某青少年社会服务机构,根据本区青少年发展需求制定了一个五年规划
(2018年真题)阿托伐他汀钙的日剂量范围是( )A.10~80mg B.5
“领导者能给下属提供学习的机会”属于巴斯有魅力领导者的()特征。A.魅力 B
关于城市热力管道工程沟槽开挖质量的说法,符合规范的有()。A.槽底不得受水浸泡
最新回复
(
0
)