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
The space between the stars is filled with matter that interstellar conditions should prevent from coalescing into solid particl
The space between the stars is filled with matter that interstellar conditions should prevent from coalescing into solid particl
admin
2020-03-28
117
问题
The space between the stars is filled with matter that interstellar conditions should prevent from coalescing into solid particle. Yet surprisingly tiny frozen particles, referred to as interstellar grains, do develop in these spaces. These grains are formed out of chemical elements that are synthesized during thermonuclear fusion in stars and supernova explosions.
The study of interstellar grains has been hampered by the inaccessibility of naturally occurring specimens for use in laboratory experiments. To date, the only source of information about interstellar grains is the stellar electromagnetic radiation that reaches the Earth after passing through regions of space containing interstellar grains. By observing the wavelengths scattered and absorbed by the grains scientists have determined that a grain’s internal structure consists of a core composed of silicates (rocklike material) and a mantle composed entirely of organic compounds. It is hypothesized that each grain begins as a silicate “
seedling
” ejected from a mature star. Continuous physical and chemical evolution then occurs in the mantle formed around the seedling.
Which of the following describe a process that is most similar to the evolution of an interstellar grain, as it is described in the passage?
选项
A、An onion is peeled layer by layer
B、A piece of iron left outdoors is gradually corroded by rust
C、A balloon is inflated by being pumped full of air
D、A piece of wood is gradually carved down to the size of a chocolate
E、A candy is formed by coating a nut with successive layers of chocolate
答案
E
解析
根据文章最后三句所描述的星际颗粒的组成,星际颗粒是由一个硅酸盐核心+有机物外壳组成的,与之最类似的是选项B。A项描述的是变小的过程。B项干扰项,从corroded一词可知,该项描述的是一个变小的过程,但是原文的星际颗粒是变大的。C项尽管气球变大了,但是没有核心。D项描述的是变小的过程。
转载请注明原文地址:https://kaotiyun.com/show/AmVO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Thefollowingquestionspresentasentence,partofwhichorallofwhichisunderlined.Beneaththesentenceyouwillfindfive
KazukoNakane’shistoryoftheearlyJapaneseimmigrantstocentralCalifornia’sPajaroValleyfocusesonthedevelopmentoffa
MilankovitchproposedintheearlytwentiethcenturythattheiceageswerecausedbyvariationsintheEarth’sorbitaroundthe
Forthewriterswhofirstgavefeudalismitsname,theexistenceoffeudalismpresupposedtheexistenceofanobleclass.Yetth
WhenamphibiansfirstappearedonEarthmillionsofyearsago,theamountofultravioletradiationpenetratingEarth’satmospher
Peoplecannotbemorallyresponsibleforthingsoverwhichtheyhavenocontrol.Therefore,theyshouldnotbeheldmorallyresp
Themindandtheimmunesystemhavebeenshowntobeintimatelylinked,andscientistsareconsistentlyfindingthatdoinggood
Noambitiouspoliticianwillchallengeanelectedpublicofficialrunningforreelectionunlessthatofficialappearsvulnerable
ManywritersofmodernEnglishhaveacquiredcarelesshabitsthatdamagetheclarityoftheirprose,butthesehabitscanbebro
GeorgeSand(AuroreLucileDupin)wasoneofthefirstEuropeanwriterstoconsidertheruralpoortobelegitimatesubjectsforl
随机试题
A.复方新诺明B.两性霉素BC.阿昔洛韦D.氟康唑E.熊去氧胆酸
()是指在已经划定的土地定级单元中,测取各因素作用分值。
依据《中华人民共和国草原法》关于“禁止开垦草原"有关规定,对()应当有计划、有步骤地退耕还草。
在城市铁路布局中,场站位置起着主导作用,按照既要方便旅客,又要提高铁路运输效能的原则,客运站的布置方式有()
采用波分复用(WDM)技术的主要目的是()。
“言而不行,言无信也;令而不从,令无诚也。不信之言,无诚之令,为上则败德,为下则危身。”这对我国各级政府的启示是()。
Jackwasafifteen-year-oldboylivingwithhislittlesister,Linda.Theirparentshadpassed【C1】______longago.Jackhadtaken
①因未在景区购物遭导游谩骂②网上购买旅游套餐③搭伴去云南旅游④旅行社被处罚⑤终止旅游扫兴而归
HuiyuanServiceApartmentLocatedintheAsianGamesVillage,witha10,000m2centralgardenandachildren’splayground.Eig
Itwasaboldideatobuildapowerstationinthedeepvalley,butit______aswellaswehadhoped.
最新回复
(
0
)