首页
登录
职称英语
Astronomers studying a certain kind of supernova (exploding star) were surpr
Astronomers studying a certain kind of supernova (exploding star) were surpr
游客
2024-01-10
20
管理
问题
Astronomers studying a certain kind of supernova (exploding star) were surprised to find the supernovas were fainter than expected. Seeking explanations, they discounted the possibility that cosmic dust might be screening out some of the light, because it would filter out blue light more than red, causing the supernovas to appear redder than they really are. Also, unless spread very smoothly throughout space, the dust would introduce large variations in the
measurements
. Another possibility is gravitational lensing, the bending of light rays as they skirt galaxies enroute. Such lensing occasionally causes brightening, but most often it contributes to the dimness of distant supernovas. Calculations show, however, that this effect becomes important only for sources more distant than the supernovas studied. [br] The passage implies which of the following about the measurements made by the astronomers?
选项
A、There were small calculation errors in their measurements.
B、There were no large variations in their measurements.
C、Their measurements were skewed by unevenly spread cosmic dust
D、Their measurements were incomplete because cosmos dust screened out some of the light.
E、It was possible to take more measurements of red light than of blue light.
答案
B
解析
第三句是虚拟语气,与现实相反。这句话的字面含义是“测量结果发生很大的变化”,因此现实中,这种测量结果的变化不大,所以选项B正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3349597.html
相关试题推荐
Studentsatacertainuniversityhavecomplainedthatsomeoftheirprofessorsd
Acarmanufacturerperiodicallydiscountscertaincarmodelstoitsdealerstoc
Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsyste
Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsyste
Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsyste
Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsyste
Certainmessengermoleculesfightdamagetothelungsfromnoxiousairbytellin
55.Acertainspeciesofbirdhastwobasicvarieties,crestedandnoncrested.Th
AcertaintypeofdinnerwaremadeinGanandiacontainslead.Leadcanleachinto
Aresearcherstudyingdrugaddictsfoundthat,onaverage,theytendtomanipula
随机试题
Lookingback,itwasnaivetoexpectWikipedia’sjoyridetolastforever.Sin
Allourattemptsto______thechildfromdrowningwereinvain.A、regainB、recove
Mostpeopleoftendreamatnight.Whentheywakeinthemorningtheysayto
.收缩时使声带紧张度增加的是:()A.环杓后肌 B.环杓侧肌和杓肌 C
关于文化娱乐场所经营的规定包括( )。A.2点至8点不得营业 B.不得在机场
楹联俗称对联或对子,是从()的对偶句中演化出来的,是中国一种独特的文学样式,也是
共用题干EarthAngels 1JoyingBresciawa
如发现开关柜线路侧接地开关无法分、合闸,应检查(____)。检查手车断路器位置是
下列情形中,属于犯罪未遂的是()。A.甲持匕首在张三每天下夜班经过的路口守候,
高级语言编写的程序不能被计算机直接所识别和执行。()
最新回复
(
0
)