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
外语
A、Gases have been heated to a temperature of multimillion-degree. B、Gases have been drawn to the black hole at a very high speed
A、Gases have been heated to a temperature of multimillion-degree. B、Gases have been drawn to the black hole at a very high speed
admin
2010-08-21
60
问题
The existence of black hole had long been predicted by theory but never confirmed.
A black hole is an extremely mysterious object. It has a gravity which is so intense that nothing, not even light, can escape from it. It can change space and time in basic ways.
A powerful X-ray stream drew the attention of scientists to the event. It is located near the center of a galaxy which is about 700 million light-years from Earth. According to the international team of scientists, gases from the star have been heated to a temperature of multimillion-degree when they were drawn toward the black hole. Thus a strong wind is produced.
Scientists said a star about the size of our sun was coming close to the black hole. The big gravity of the black hole pulled the star to the point of breaking. It is estimated to have a gravity 100 million times that of our sun.
The effect is similar to the dragging force the moon has on the Earth’s oceans, but is much more violent. The black hole has observed to have eaten up about 1 percent of the star. It seems that this unlucky star has just entered the wrong neighborhood.
Scientists have seen other similar X-ray streams before, but never were able to locate them at the center of a galaxy, where black holes may exist. The new observations also found that a black hole is always surrounded by X-rays.
选项
A、Gases have been heated to a temperature of multimillion-degree.
B、Gases have been drawn to the black hole at a very high speed.
C、Gases have been tearing apart by the black hole.
D、Gases have been sucked by the black hole.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Oj7K777K
0
大学英语六级
相关试题推荐
Today’slecturewe’llcenterontheprehistoricpeopleofNevadaDesert.Nowmostoftheseprehistoricdesertpeople【B1】______t
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantininterpersonalcommunicationis
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantininterpersonalcommunicationis
Formuchofitshistory,innumerableepigramshavebeencoinedaboutLondonbybothherenthusiastsanddetractors.Thegreat18
Theteacher____________(宁愿女儿和自己不在同一所大学里教书)。
A、Heisannoyedbutunderstands.B、Heisnothappy.C、HeknowsMarymustdrivealongway.D、Heisafraidofthewomanheisspe
A、Sendingthenextpackageearlier.B、Waitingpatiently.C、Usingairfreight.D、LookingforthepackageC男士说10天前寄的包裹到现在都没到,女士委婉地
Sixteen-year-oldMichaelViscardiofSanDiegowonfirst【B1】_______intheSiemensWestinghouseCompetitioninMath,Scienceand
Sixteen-year-oldMichaelViscardiofSanDiegowonfirst【B1】_______intheSiemensWestinghouseCompetitioninMath,Scienceand
OneofthefoundingfathersoftheInternethaspredictedtheendoftraditionaltelevision.VintCerf,whohelpedtobuildthe
随机试题
人类对森林的过度砍伐,对草原和湿地的破坏,工业和汽车排放大量的CO2,是我国喜马拉雅山的冰峰不断消融。从因果关系上看,这属于()。
You______thisbook.Youcanborrowitfromthelibrary.
Passingbyasupermarket,Iwasattractedbyalongqueueofpeoplewithbigplasticbagsfullofkindsofgoodstheyboughtout
下列关于胆汁的叙述,哪项是错误的
A、红霉素B、琥乙红霉素C、克拉霉素D、阿齐霉素E、罗红霉素在胃酸中稳定且无味的抗生素是()。
按照消费者对产品两种属性的重视程度进行划分,就会形成不同偏好的细分市场,这时会出现()模式。
用一种钢制的活动防护装置或活动支撑,通过软弱含水层,特别是河底、海底或者城市中心区修建隧道的方法是()。[2012年10月真题]
会计从业资格管理机构作出准予颁发会计从业资格证书的决定,应当自作出决定之日起()内向申请人颁发会计从业资格证书。
做学问,“要大处着眼,小处下手”。由博入专,不可急功近利,能大处着眼,为学方不致流于__________,而有裨益于世;能小处下手,方不致流于__________,所以做学问千万不要求速效。依次填入画横线部分最恰当的一项是()。
把下面的六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是:
最新回复
(
0
)