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
2024-02-20
30
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 bums 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、By burning hydrogen.
B、By cooling other planets.
C、By heating upper layers.
D、By giving out radiation.
答案
A
解析
题干询问太阳如何产生能量。对话中男士说太阳是个巨大的核能堆,能够燃烧氢产生能量,故答案为A)。
转载请注明原文地址:https://tihaiku.com/zcyy/3466179.html
相关试题推荐
[originaltext]ThefirstEnglishdictionarywaspublishedin1604.Thedicti
[originaltext]ThefirstEnglishdictionarywaspublishedin1604.Thedicti
[originaltext]Oneoftheimportantmaterialsusedintheconstructionofbu
[originaltext]Oneoftheimportantmaterialsusedintheconstructionofbu
[originaltext]M:Well,here’syourroom,ma’am.Um...afteryou.W:Why,tha
[originaltext]M:Well,here’syourroom,ma’am.Um...afteryou.W:Why,tha
[originaltext]M:Well,here’syourroom,ma’am.Um...afteryou.W:Why,tha
[originaltext]Whenmyinterestshiftedfromspacetothesea,Ineverexpec
[originaltext]Whenmyinterestshiftedfromspacetothesea,Ineverexpec
[originaltext]Theperiodofengagementisthetimebetweenthemarriagepro
随机试题
Upuntiltheageof18,Ireadverylittle.I【C1】______myselftowhatwasne
D
A.老蜜B.蜜水C.嫩蜜D.中蜜E.生蜜含多量油质、黏液质的药物制备大蜜丸时使用
甲烷发酵的四阶段理论过程为()。 A产氢产乙酸阶段,水解、发酵阶段,产甲烷
在面试过程中,面试考官可以考察应聘者( )A.相关知识的掌握程度 B.判断、
关于拍卖底价的说法,错误的是()。A:拍卖底价是拍卖前公布的拍卖标的物的评估价
下列对带锯机操纵机构的安全要求中,错误的是()。A.启动按钮应设置在能够确认
关于常用水泥凝结时间和体积安定性的说法,错误的是( )。A.水泥的凝结时间分初
不属于高桩码头沉桩控制的是()。A.偏位控制 B.承载力控制 C.桩的裂损控
实施雷达管制必须有()设备的支持。A.精密进近雷达 B.二次监视雷达 C.
最新回复
(
0
)