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
35
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
Inchildren’seyes,theirparentscan______allsortsofproblems.
Theatmosphereandoceansarenottheonlypartsoftheenvironmentbeingdamaged.Rainforestsarebeingquicklydestroyedasw
Longtimeago,theancientpeoplecouldnottraveltoanyfarawayplacesfortheyhadnoinstrumentstocarrythemacrossthewi
Thesecretaryworkedlateintothenight,______alongspeechforthepresident.
Heisexpectedtomakeaspeechthisafternoon,______.
Everyoneneedsfriends.Weallliketofeelclosetosomeone.Itisnicetohaveafriendtotalk,laugh,anddothingswith.Su
Morethan30,000driversandfrontseatpassengersarekilledorseriouslyinjuredeachyear.Ataspeedofonly30milesperho
Arapidmeansoflong-distancetransportationbecameanecessityfortheUnitedStatesassettlement(新拓居地)spreadoverfartherw
"WantedbytheFBI."Tothemurderer,orthebankrobber,thesearethemostfrighteningwordsintheworld.Whenthecriminal(
Therewasabigpileofbricksonthetopofatallbuildingandamanhadtobringthemdowntotheground.Hehadalongrope
随机试题
Inperiodofthesummerholidaystherewillbearevisedschedule(修改过的时刻表)ofser-vicesforthestudents.Changesfordining-ro
以下哪一项是骨折治疗的首要步骤
颅内出血的新生儿易采用的体位是
依据《工伤保险条例》的规定,有关工伤社会保险与民事赔偿的表述,不正确的是()。
作为企业财务管理的目标,每股收益最大化目标较利润最大化目标的优点在于()。
决定内在经济的主要因素有()。
(2016·四川)李教授参观一所中学时,翻了翻学生课桌上的课本,问道:“地下一千米比地面冷还是热?”学生面面相觑,哑口无言。旁边的任课老师急了,马上问学生:“地球深层是什么地质结构?”全班学生马上回答:“是熔岩。"以上案例中,学生对地球结构的学习属于(
个别化教学
有限责任公司:又称有限公司,指依照公司法的有关规定设立的,股东以其出资额为限对公司承担责任,公司以其全部资产对公司的债务承担责任的企业法人。其股东人数有最高人数的限制,不能公开募集股份,不能发行股票,而且股东转让有严格限制。下列单位哪一项不是有限责任公司?
多人纸牌游戏,如扑克和桥牌,存在一些欺骗对手的技巧。不过,仅由一个人玩的纸牌游戏并非如此。所以,存在一些欺骗对手的技巧并不是所有纸牌游戏的本质特征。下面哪项最类似于题干中的推理?
最新回复
(
0
)