首页
登录
职称英语
[originaltext]W: Wow! What a beautiful sunset.M: Enjoy it while it lasts, the
[originaltext]W: Wow! What a beautiful sunset.M: Enjoy it while it lasts, the
游客
2024-02-14
17
管理
问题
W: Wow! What a beautiful sunset.
M: Enjoy it while it lasts, the sun won’t be around forever.
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. (19) When the sun dies, the earth will be destroyed too.
W: Wow, hold on, start from the beginning.
M: Okay. Like all stars, (20) 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. When it does, gravity will cause the sun’s core to contract. (21) 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 become bigger.
W: It is bad for us.
M: After a few billion years the core will begin to cool and expand. (22) 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, human might have been living on another planet.
19. What may happen to the earth when the sun dies?
20. How can the sun create energy?
21. What will happen to the sun’s core when it contracts?
22. What will the core finally be after the sun’s upper layer expanded?
选项
A、It may stay there.
B、It may disappear.
C、It may cold down.
D、It may be destroyed.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3450230.html
相关试题推荐
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
[originaltext]Thelawyersrepresentingtwoeleven-year-oldboysaccusedofk
[originaltext]Thelawyersrepresentingtwoeleven-year-oldboysaccusedofk
[originaltext]M:Here’syourroom,you’llstayhereoverthreenights,madam?W
[originaltext]M:Here’syourroom,you’llstayhereoverthreenights,madam?W
[originaltext]M:Ican’tbelieveKenmissedsuchanimportantmeetingeventho
[originaltext]M:Ican’tbelieveKenmissedsuchanimportantmeetingeventho
[originaltext]M:Ican’tbelieveKenmissedsuchanimportantmeetingeventho
[originaltext]M:Ican’tbelieveKenmissedsuchanimportantmeetingeventho
[originaltext]RooseveltwastheonlypresidentinAmericanhistorywhoserv
随机试题
Motivationis"thedrivingforcewithinindividualsthatimpelsthemtoact
【S1】[br]【S5】将taken改为taking。本题属于过去分词与现在分词误用的问题。jetaircrafttakingoffandland
Inhisyouth,KnuteAxelbrodwantedtolearnmanylanguages,toknoweveryth
尿道损伤病人的临床表现有()。A.尿液外渗 B.尿频 C.尿道出血 D.
对于建筑规模较大、报警点数多的具有火灾报警和联动控制功能的火灾自动报警系统,消防
伪造签名属于房地产经纪业务纯粹风险中( )引起的风险。A:信息欠缺 B:操作
某城市管廊中,天然气管道敷设在独立舱室内。下列防火设计的做法不符合规范要求的是(
埃里克森认为,在成年初期的发展课题是( )A.自我同一性的确立 B.发展成熟
下列关于投资项目建设规模的说法,正确的是( )。A.单位投资利润是衡量项目经济
一定温度下,某反应的标准平衡常数KΘ的数值:A.恒为常数,并与反应方程式的写法有
最新回复
(
0
)