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
6
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
AmazinglyfortheBritish,wholovequeues,thereisnoformalline-up—theb
在办公室的防火巡查中,发现(),应当上报有关领导,制定限期改正措施。A.灯具、
碱骨料反应是指粗细骨料中的二氧化硅与水泥中的碱性氧化物发生化学反应。()
不属于可申请基金销售业务资格的主体是()。A.证券投资咨询机构 B.证
孕妇,36岁,孕2产0,妊娠35周,1年前因妊娠5个月死胎而作引产术。产前检查:
根据《北京证券交易所重大资产重组业务指引》,上市公司首次披露重组方案至发出审议本
社区卫生服务的内容不包括A.预防 B.医疗 C.各种保健仪器的试用 D.计
中间验收中影响机械安装的问题未整改完成前,不得进行后续安装工作。
区域环境承载力最终表征为区域所能承受的社会经济规模和()。A.生物资源 B
在计算经营者的效益年薪时。()模式认为经营者的效益收入就是其经营的风险收入。A
最新回复
(
0
)