首页
登录
职称英语
[originaltext] A U.S. spacecraft is completing a five-and-a-half-month voyag
[originaltext] A U.S. spacecraft is completing a five-and-a-half-month voyag
游客
2025-01-01
20
管理
问题
A U.S. spacecraft is completing a five-and-a-half-month voyage to a distant comet and could create celestial fireworks when it crashes into it Monday, America’s Independence Day. Scientists want to know what a comet’s nucleus is made of and believe the best way to find out is to blast a hole in one.
The target is the comet Tempel—1,431 million kilometers away. (7) As NASA puts it, meeting its head on at such a gTeat distance is like threading a needle.
(8) NASA scientist Tom Morgan describes a comet as a big dirty snowball in space, a glowing collection of ice, rocks, dust, and gases whose interior composition is intriguing.
Knowing the makeup of a comet would provide information about the chemistry and physics of the solar system as it formed 4.5 billion years ago.
选项
A、Its surface temperature is above zero.
B、It’s a big solid ball.
C、It’s gaseous.
D、It was formed 4.5 billion years ago.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3894156.html
相关试题推荐
[originaltext]ThetwoKoreanssignedadeallastFridaytoallowre-unions
[originaltext]Headmaster:Goodmorning,MrHarris.Dositdown.Iunderstandy
[originaltext]Headmaster:Goodmorning,MrHarris.Dositdown.Iunderstandy
[originaltext]A14-year-oldAmericangirlwasstabbedandkilledinaquiet
[originaltext]A14-year-oldAmericangirlwasstabbedandkilledinaquiet
[originaltext]IsraeliPrimeMinisterArielSharonbackeduphiscallmfora
[originaltext]IsraeliPrimeMinisterArielSharonbackeduphiscallmfora
[originaltext]Britain’soppositionleadersaidyesterdayhehadnotlosthop
[originaltext]OverthepasttwoweekstheBBCWorldServicehasbeenrunning
[originaltext]OverthepasttwoweekstheBBCWorldServicehasbeenrunning
随机试题
Mostepisodesofabsent-mindedness—forgettingwhereyouleftsomethingorwo
[originaltext]VisitorstoBritainaresometimessurprisedtolearnthatnew
Marsisnot,itseems,thedryoldplanetweoncebelievedittobe.Astronau
声像图显示为围绕睾丸的液性暗区的疾病是A.附睾炎 B.肿瘤 C.睾丸炎 D
莫扎特创作的歌剧《费德里奥》最终版本有两幕。
2012年,某省规模以上工业增加值10875亿元,比上年增长7.1%,月度增速从
邪盛病进时,常见的脉象是A.长 B.紧 C.大 D.滑 E.实
患者男,27岁。间歇性腿痛一个月,疑为血栓闭塞性脉管炎,为检查患者动脉搏动情况,
《素问*宝命全形论》之“经气已至,慎守勿失”,意指A.行气 B.得气 C.催
甲公司为增值税一般纳税人,商品销售业务适用的增值税税率为13%,2021年发生如
最新回复
(
0
)