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
2024-02-23
4
管理
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://tihaiku.com/zcyy/3475720.html
相关试题推荐
[originaltext]ChinaisexpectedtoreplacetheUnitedStatesastheWorld’s
[originaltext]ChinaisexpectedtoreplacetheUnitedStatesastheWorld’s
[originaltext]Fromthislookoutweenjoyoneofthemostspectacularviews
[originaltext]W:Goodmorning.MICHouseAgency.M:Goodmorning.I’mringinga
[originaltext]W:Goodmorning.MICHouseAgency.M:Goodmorning.I’mringinga
[originaltext]Isyourfamilyinterestedinbuyingadog?Adogcanbeahapp
[originaltext]Daughter:Dad,dad.What’sforbreakfast?Dad:[Dadmumblessometh
[originaltext]PoliceOfficer:Hello.24thPrecinct.OfficerJonesspeaking.Man
[originaltext]PoliceOfficer:Hello.24thPrecinct.OfficerJonesspeaking.Man
[originaltext]W:Hey,Mark,haveyoubeenabletosellyouroldpianoyet?M:Ah,
随机试题
TheU.S.dollarwassupposedtobeattheendofitsrope.Kickingthebucke
Afterathree-yearsurveyofthesocialandbehavioralsciences,acommitte
为了探索生活形态变化与都市发展之间的关系,应进行( )调查。A.收入水平 B
男,20岁。与人口角后,被人用利器扎伤颧颞部,造成软组织出血,急诊采用压迫止血,
(2019年真题)根据会计法律制度的规定,单位下列机构中,应派员监销电子会计档案
下列关于景观敏感度评价的说法,正确的有( )。A.景观表面相对于观景者的视线坡
为了防止塌孔与缩径的产生,在钻进速度方面,应控制其成孔速度在( )m/h。A.
调值公式中各可调因子的现行价格指数,指根据进度付款、竣工付款和最终结清等约定的付
男,50岁,30年吸烟史,支气管镜活检可见鳞状上皮和支气管腺体,此种病理变化属于
某单代号网络图如下图所示,存在的错误有( )。 A.多个起点节点 B.有多余
最新回复
(
0
)