首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、5 billion years. B、4 billion years. C、4.5 billion years. D、5.4 billion years. C原义直现。大阳的强势期已有四十五亿年,可在对话中直接找到答案。
A、5 billion years. B、4 billion years. C、4.5 billion years. D、5.4 billion years. C原义直现。大阳的强势期已有四十五亿年,可在对话中直接找到答案。
admin
2010-10-14
49
问题
W: Wow, what a beautiful sunset.
M: Enjoy it while it lasts. The sun won’t be around forever, you know.
W: You mean one day the sun will disappear?
M: Not exactly disappear, but the sun will eventually burn out and die.
W: Won’t that make things really cold down here?
M: Actually, there won’t be any here. When the sun dies, the earth will be destroyed too.
W: Whoa, hold on. Start from the beginning.
M: Ok. Like all stars the sun is basically a giant nuclear reactor that burns hydrogen to create energy. But like any reactor, the sun needs fuel to keep going. It’s been going strong for around 4. 5 billion years, and will probably keep burning for about five billion more.
W: But then the fuel will run out.
M: Exactly. And when it does, gravity will cause the sun’s core to contract. When it contracts, the core will get hotter, which will heat up the sun’s upper layers and make them expand. The sun will then become what’s called a red giant, and its radius will reach just past the orbit of Venus.
W: Which is bad for us.
M: We’ll be burned to a crisp.
W: Sounds painful.
M: After a few billion years, the core will begin to cool and expand. The sun’s upper layers will expand and lose material, and eventually the core will cool enough to become a white dwarf star, and finally a black dwarf.
W: So we’re pretty much doomed.
M: Yes, but not for billions of years. Who knows? By then humans might be living on another planet. Or we’ll have been enslaved by a bunch of dirty apes!
W: I think someone’s been watching too much cable TV.
选项
A、5 billion years.
B、4 billion years.
C、4.5 billion years.
D、5.4 billion years.
答案
C
解析
原义直现。大阳的强势期已有四十五亿年,可在对话中直接找到答案。
转载请注明原文地址:https://kaotiyun.com/show/Wc87777K
0
大学英语四级
相关试题推荐
EmployersandcareerexpertsseeagrowingprobleminAmericansociety--a(n)【C1】______ofcollegegraduates,manyburdenedwitht
Hereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.Thisis,however,a【S1】______.Noscho
ADelicateBalanceIn1965theAmericanstatesmanAdlaiEStevensonsaid,"Wealltraveltogether,passengersonalittlesp
E-mailImaginebeingabletosendalettertosomeone,anywhereintheworld,thatincludedpicturesandsoundsaswellasw
Ifyoudreamincolor,you’renotalone:themajorityofpeopletodayclaimtohave.colorfuldreams.Butitwasn’t’alwaysthus
AnEnglishschoolboywouldonlyaskhisfriend:"Wassatime,then?"Tohisteacherhewouldbemuchmorelikelytospeakinamo
A、Shedoesn’tliketheprofessorverymuch.B、Shedoubtsclasswillbecanceled.C、Shedoesn’twanttoattendtheconference.D、
A、PhonetheVillageInnforareservation.B、Askherparentstocomesomeothertime.C、Calleachhotelintheareatocheck.D、
Onesummernight,onmywayhomefromworkIdecidedtoseeamovie.Iknewthetheatrewouldbeair-conditionedandIcouldn’t
PicnicintheDining-room"Weshallbehavingapicnictomorrowafternoon,"saidmyhostess,Mrs.Brown."ItWillbequites
随机试题
企业为激励员工,赋予优秀员工“劳动模范”称号,该激励方式属于()
上网访问网站,就是访问存放在()上的相关文件。
(英语专业学生做)Individualism,independence,andself-relianceareperhapsthemostdistinctiveAmericancharacteristics.American
患者,女,45岁。已呕吐1天,呕吐物为宿食。查体:一般状况尚可,心肺(一),腹软,上腹可见胃型,有振水声,肝脾未触及,临床诊断为“幽门梗阻”。问题3:提示:胃镜确诊为十二指肠溃疡合并幽门梗阻。进一步的治疗措施有1.洗胃2.静脉滴注奥美拉唑3.补液
某初产妇已妊娠40周,宫口开全2小时,胎头棘下2cm,宫缩较前减弱,胎膜已破,胎心120次/分,其情况较好,决定行会阴侧切和胎头吸引术。胎头吸引术应何时解除负压
下列对于有两个及两个以上产权、使用单位的同一建筑物,消防设施管理职责说法中,不符合要求的是()。
近年来,在经济发展前景不明和资金链吃紧的压力下,多数跨国公司基于实际的考虑,开始实行战略性收缩,以期回笼资金,抵御国际金融危机的冲击。与此同时,另一些跨国公司基于对未来的判断,提高了新兴市场和新兴产业在全球战略中的比重,抢占下一个繁荣的先机。例如,自国际金
动机的功能有()
Whatisthewoman’sreply?
A、Forhelpingtheblind.B、Forcompanionship.C、Forwatchingthedoor.D、Forfunandpleasure.A本题考查原因。由句(6)可知,女士说她们家养狗是为了帮助盲人。因
最新回复
(
0
)