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
专升本
How many things can you see in the night sky? A lot! On a clear night you might see the Moon, some planets, and thousands of spa
How many things can you see in the night sky? A lot! On a clear night you might see the Moon, some planets, and thousands of spa
admin
2012-12-31
98
问题
How many things can you see in the night sky? A lot! On a clear night you might see the Moon, some planets, and thousands of sparkling stars. You can see even more with a telescope.
But scientists believe there are some things in the sky that we will never see. We won’t see them with the biggest telescope in the world, on the clearest night of the year. That’s because they’re invisible. They’re the mysterious dead stars called black holes.
As a star’s gases burn, they give off light and heat. But when the gas runs out, the star stops burning and begins to die.
As the star cools, the outer layers of the star pull in toward the center. The star squashes (挤压) into a smaller and smaller ball. If the star was very small, the star ends up as a cold, dark ball called a black dwarf. If the star was very big, it keeps squashing inward until it’s packed together tighter than anything in the universe.
Imagine if the Earth were crushed until it was the size of a tiny marble. That’s how tightly this dead star, a black hole, is packed. What pulls the star in toward its center with such power? It’s the same force that pulls you down when you jump--the force called gravity. A black hole is so tightly packed that its gravity sucks in everything--even light. The light from a black hole can never come back to your eyes. That’s why you see nothing but blackness.
So remember: Scattered in the silent darkness are black holes--the great mystery of space.
Which word has the same meaning with the word "mysterious"?
选项
A、ordinary
B、bright
C、strange
D、common
答案
C
解析
第二段最后一句。选项C是正确的。前面讲了这些亡星是肉眼看不见的,可它们又的确存在。所以很神秘,也就不一般了(选项A和B)。之所以叫黑洞是因为它没有光,所以选B也是不正确的。
转载请注明原文地址:https://kaotiyun.com/show/ZAeC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
OnChristmasEve--thenightbeforeChristmasDaychildrenareveryhappy.Theyputtheirstockingsattheendoftheirbedsbefo
Manyayoungpersontellsmehewantstobeawriter.Ialwaysencouragesuchpeople,butIalsoexplainthatthere’sabigdi
FULLTIMEDRIVERSWANTEDCleandrivinglicence.Mustbeofsmartappearance.Agedover25.Applyto:CapesTaxis,17
Therewasiceontheroad,andthedoctor’scarhitatreeandturnedoverthreetimes.Tohissurprise,hewasnothurt.Hegot
Strongbondscanexistindatingrelationships.MycousinCandiceandherfriendLouisstarteddatingcasuallylastyear.Asthe
Theenergycompanies______urgentstudiesoftheArcticenvironment.
AyoungpairofpandasisexpectedtosettleintheirnewhomeintheAtlanta’sZooto-morrow,tileBeijingYouthDailyreporte
TheVoiceofAmericabeganduringtheWorldWarIIwhenGermanywasbroadcastingaradioprogramtogetinternational【21】.Ameri
Nottoolongago,anincidentthathappenedatWaltDisneytouchedmegreatly.AguestcheckingoutofourPolynesianVillagere
AAnumberofforeignvisitorsBweretakentotheindustrialexhibitionCwhichtheyDsawmanynewproducts.
随机试题
在PowerPoint2010中,设置好的切换效果,可以应用于________。
骨样骨痂出现在骨折愈合的哪阶段
σ0.2表示规定残余伸长率的0.2%的应力,作为无明显屈服点的硬钢的条件屈服点。()
政府调控价格产品及服务的影子价格包括()。
外来务工人员冯某想让7岁的孩子在工作地附近的公立小学就读。对于冯某的这种情况,教育行政部门应该()。
根据以下资料回答下列题。我不喜欢一个苦孩求学的故事。家庭十分困难,父亲逝去,弟妹嗷嗷待哺,可他大学毕业后,还要坚持读研究生,母亲只有去卖血……我以为那是一个自私的学子。求学的路很漫长,一生一世的事业,何必太在意几年蹉跎?况日.这时间的分分秒秒都苦涩无比,
Change,ortheabilityto【C1】______oneselftoachangingenvironmentisessential【C2】______evolution.Thefarmerwhoselandisr
软件生产工程化的基础是软件生产的规范化和标准化,以下哪些是与软件生产工程化有关的内容?()Ⅰ.软件开发的流程Ⅱ.软件的设计Ⅲ.文档制作Ⅳ.项目管理
近年来,中国经济保持快速发展,为世界经济发展注入了活力。实践证明了中国在加入世贸组织之前的预言:中国的发展离不开世界,世界的发展需要中国。未来20年,在全面建设小康社会的进程中,中国一定会对世界经济的发展和实现全人类的共同进步做出历史性的贡献。为此,中国
在中国,大熊猫是和平的象征。大熊猫是一种濒危物种。由于它们的栖息地遭到了破坏,它们的数量正在急剧下降(dwindle)。大熊猫的身体是白色的,在它的眼睛、耳朵、肩膀、胸部、腿部和脚周围都有一些黑色斑块。这黑白相间的保护色彩可以让熊猫在雪地和岩石的环境中伪装
最新回复
(
0
)