首页
登录
职称英语
Scientists have long sought the reasons for the relatively young age of
Scientists have long sought the reasons for the relatively young age of
游客
2025-02-23
6
管理
问题
Scientists have long sought the reasons for the relatively young age of the
majority of Martian meteorites discovered on Earth in comparison with the age
of Mars, an enigma exacerbated by the fact that the Martian rocks were ejected
by only six or seven separate impact events. Previous tests had predicted that
(5) driving meteorites to Earth would require a collision with an asteroid immense
enough to make a crater 12-kilometers across, but because such huge impacts
are extremely infrequent, it was unlikely that enough of them could have
occurred to explain our planet’s Martian meteorite collection.
Now astronomer James Head’s higher-resolution models demonstrate that
(10) collisions making craters only three kilometers across can jettison 10 million
fragments, each about 10 centimeters across, into space, a distribution
sufficient to cause some of them to be found on Earth. Sections of the planet
covered by debris (thus likely to be made up of older terrain) would require
larger and hence rarer impacts, and thus meteorites which reach Earth are
(15) predictably biased toward younger ages.
选项
A、presenting an argument to support a particular hypothesis
B、suggesting an answer to a theoretical question
C、questioning the assumptions of a research project
D、criticizing experimental results
E、explaining the origin of certain scientific data
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3968808.html
相关试题推荐
A、thecolonialauthorityneversoughttoemploytaxationinFrenchCanadaexcept
Althoughscientistshavelong______thehumanappendixas______organ,therei
A、Scientistshaveruledoutthepossibilitythattheappendixisinvolvedinhin
Althoughsomescientists______thecredibilityoftheworkoftheirassistants,
Scientistshavelongsoughtthereasonsfortherelativelyyoungageof
Almostallrecognizethatnon-scientistsaswellaslaymenareinterestedinsci
Like______,ArcticscientistssequesteredonthePolemustaccustomthemselvest
Inthenineteenthcentury,scientistsshowedthatmanyfamiliarsubstancessuch
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
随机试题
Dayafterday,asmallbluetruckspeedsalongtheroadsofDenmark’sisland
Inlasttwoyearstheworldhasseenanintensification【M1】______.inthese
近代企业制度的典型形式为( )。A.合伙企业 B.公司 C.业主制企业
下列不属于劳动争议仲裁委员会成员组成的是()。A.劳动行政部门代表 B.司法
关于移动平均值背离指标(MACD)的说法正确的是() Ⅰ.MACD由离差
A.寒湿痹痛 B.胸痹心痛 C.热毒血痢 D.寒饮咳喘 E.寒疝腹痛吴茱
下列各项中,不符合内部牵制的要求的是()。A、出纳人员管票据 B、出纳人员
关于浸润性导管癌,下列哪项错误? A.由导管内癌发展而来B.癌细胞排列成单行
(2021年真题)根据劳动合同法律制度的规定,劳动者存在的下列情形中,用人单位可
蛛网膜下腔出血的诊断要点
最新回复
(
0
)