首页
登录
职称英语
This passage is adapted from material published in 2001.In 1998 scientists usin
This passage is adapted from material published in 2001.In 1998 scientists usin
游客
2025-02-21
19
管理
问题
This passage is adapted from material published in 2001.
In 1998 scientists using the neutrino detector in Kamioka, Japan, were able to observe several thousand neutrinos—elusive, tiny subatomic particles moving at nearly the speed of light and passing through almost everything in their path. The Kamioka findings have potentially far-reaching ramifications. They strongly suggest that the neutrino has mass, albeit an infinitesimal amount. Even a tiny mass means that neutrinos would outweigh all the universe’s visible matter, because of their vast numbers. The findings also suggest that a given neutrino does not have one stable mass or one stable identity; instead it oscillates from one identity or "flavor"(physicists’ term describing how neutrinos interact with other particles)to another. This oscillation may explain why, although the Sun is a large source of neutrinos, detectors capture far fewer solar neutrinos than the best theory of solar physics predicts: the neutrinos may be changing to flavors undetectable by detectors. Finally, while the standard particle-physics model—which describes all matter in terms of twelve fundamental particles and four fundamental forces—does not allow for neutrinos with mass, there are theories that do. Further experiments to confirm that neutrinos have mass could help physicists determine which, if any, of these theories is correct. [br] According to the passage, one significant implication of the discovery that neutrinos have mass is that such a discovery would
选项
A、cast doubt on the solar origins of many of the neutrinos that reach Earth
B、help to establish the validity of the standard particle-physics model
C、indicate that most of the visible matter of the universe is composed of neutrinos
D、entail that the total weight of all the visible matter in the universe is less than that of all the neutrinos in the universe
E、mean that the speed with which neutrinos normally move can be slowed by certain types of matter
答案
D
解析
Choice D: entail that the total weight of all the visible matter in the universe is less than that of all the neutrinos in the universe
转载请注明原文地址:https://tihaiku.com/zcyy/3966275.html
相关试题推荐
Byrecyclingmaterialsandsalvagingunusedsupplies,thehealthcareindustryc
Scientistswonderwhattodowiththedeadsatellites,jettisonedrockets,drift
Thejudge’spublishedopinions,thoughsophisticatedandsubtle,wereundeniably
Thediscoveryofthefossilwas(i)______and(ii)______,surprisingscientistsa
Concreteis______ofmanymaterials,acompositeofrocks,pebbles,sand,andcem
Believingthatscientistsshould(i)______thepublicaboutimportantscientific
Themostobjectionablepassagesinthenovelwere______attheinsistenceofthe
Moraleamongthestaffscientists(i)______whenthedirectordolefullyannounced
Thescientistshypothesizedthatthenewlydiscoveredvirusmultipliesby(i)___
Adiscerningpublishingagentcan______promisingmaterialfromamassofsubmiss
随机试题
[originaltext]SentenceNo.1Sydneyisaverymoderncity,butitalsohasmany
AstudyconductedbyanAustralianscienceagencyhasdiscoveredsignsthat
[originaltext]M:Excuseme.Where’syourrockmusicsection?W:Rockmusic?I’m
ACensusBureau(人口调查局)surveyreleasedThursdayshowsacollegegraduateca
我有了生命以来,在这个世界上虽然仅仅经历了二十几个寒暑,但是这短短的时期也并不是白白度过的.这期间我也曾看见了不少的东西,知道了不少的事情,我的周围是无边的
[originaltext]W:Hi,KaveaYourroommatetoldmethatIcouldfindyouintheT
单层排架结构柱基,进行地基变形计算时,应验算()。A.局部倾斜 B.沉降量
粗集料洛杉矶磨耗试验,通常要求磨耗机以30-33r/min的转速转动()转后停
硝苯地平的药理特点正确的是A、起效快 B、药效时间短 C、血压波动小 D、
随着近几年微博、微信等新媒体的快速发展,强调个人化的“自媒体”也成为了家喻户晓的
最新回复
(
0
)