首页
登录
职称英语
[originaltext] The existence of black hole had long been predicted by theory
[originaltext] The existence of black hole had long been predicted by theory
游客
2024-06-04
27
管理
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://tihaiku.com/zcyy/3618775.html
相关试题推荐
[originaltext]W:Excuseme,doyoumindansweringafewquestions?M:No.W:Fi
[originaltext]W:Excuseme,doyoumindansweringafewquestions?M:No.W:Fi
[originaltext]W:Excuseme,doyoumindansweringafewquestions?M:No.W:Fi
[originaltext]W:Excuseme,doyoumindansweringafewquestions?M:No.W:Fi
[originaltext]Amoment’sdrillingbythedentistmaymakeusnervousandup
[originaltext]M:Hey,Karen.Looklikeyou’vegetsomesunthisweekend.W:Yea
[originaltext]M:Hey,Karen.Looklikeyou’vegetsomesunthisweekend.W:Yea
[originaltext]M:I’dliketotakethosethreeoutandreturnthesetwo.W:Okay
[originaltext]M:I’dliketotakethosethreeoutandreturnthesetwo.W:Okay
[originaltext]M:I’dliketotakethosethreeoutandreturnthesetwo.W:Okay
随机试题
Sofarenvironmentalprotectionhasleftmuchroom______;lumberingandhuntin
ThereisagreatconcerninEuropeandNorthAmericaaboutdecliningstandard
(1)Thepolicemanonthebeatmoveduptheavenueimpressively.Theimpressiv
Doyouknowwhatpositionyouregularlytakeupinbedwhenyoudropoffto
若C程序表达式中引用了未赋初值的变量,则().A.编译时一定会报告错误信息,该
“罗马定义”将在某国逗留不足24小时的游客称为( )。A.短期游览者 B.旅
协定账户属于非存款性负债业务创新。()
下列属于基金托管业务基本规范的有( )。 ①资产独立 ②业务隔离 ③资金
茯苓的主治病证不包括A.水肿B.热结便秘C.脾虚便溏D.痰饮E.心悸失眠
抵押财产折价或者拍卖、变卖后,其价款超过债权数额的部分归( )。A.抵押人所有
最新回复
(
0
)