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
考研
Traveling to Mars is usually a【C1】________business—with a single spacecraft taking off from a single launchpad for the seven-mon
Traveling to Mars is usually a【C1】________business—with a single spacecraft taking off from a single launchpad for the seven-mon
admin
2022-03-27
71
问题
Traveling to Mars is usually a【C1】________business—with a single spacecraft taking off from a single launchpad for the seven-month trip to the Red Planet. That appeared to be the case again on July 30, when NASA’s Perseverance rover roared【C2】________the pad at Cape Canaveral. But this time the ship will have plenty of【C3】________.
On July 19, the United Arab Emirates made its first bid to join the Mars game, launching the "Hope" spacecraft on a mission to orbit Mars for at least two years【C4】________studying its atmosphere. Four days later, China launched its "Questions to Heaven" spacecraft, a three-part ship【C5】________an orbiter, a lander and a six-wheel rover. And a fourth mission, a joint Russian-European project, ExoMars,【C6】________a rover of its own, was also planned for this summer, though it has been【C7】________to 2022 because of engineering problems with its parachute and avionics.
So why all the interest in Mars—and why right now? The timing issue has【C8】________to do with planetary mechanics. As they fly their differing solar orbits—Earth on the inner track, Mars on the outer—the distance between the two worlds is forever changing. At their greatest remove, when they are on【C9】________sides of the sun, they are up to 250 million miles apart. But once every two years, they line up on the same side of the sun, with just 35 million miles separating them. This summer just such an alignment is taking place, dramatically slashing inter planetary travel time to the current seven-month itinerary. So that explains the【C10】________question.
The why part is because of Mars’ tantalizing,【C11】________biological history. The surface of the planet is etched with dry riverbeds, stamped with ancient sea basins, marked by deep depressions that could only【C12】________long-vanished water.
Perseverance is landing in one such place; the Jezero Crater, north of the Martian equator, which is lined with both inflow and outflow channels showing it was once a vibrant sea. Previous rover analyses in similar locations have discovered chemicals and【C13】________that form only in the【C14】________of water, proving that Mars was once, like Earth,【C15】________wet.
Now the mission is to look for actual fossilized organisms or even【C16】________of extant microbial life. To that end, Perseverance is the most ambitious of the new spacecraft and is actually just the first part of a multipart mission. During its explorations, it will【C17】________Martian soil samples and set them neatly on the ground【C18】________another spacecraft that could leave Earth as early as 2026.
Finding life on Mars would be an epochal【C19】________The rights that go with being first to make the find is part of what makes the planet the hot new【C20】________.
【C18】
选项
A、hoping
B、anticipating
C、awaiting
D、waiting
答案
C
解析
动词辨析题。四个选项分别为A项hoping“希望”;B项anticipating“预期,期望”;C项awaiting“等待”;D项waiting“等待”。空格所在句意为“在探测过程中,毅力号将收集火星土壤样本,并将它们整齐地放在地面上,________最早于2026年离开地球的另一艘航天器”,由此可知空格处所填词应有“等待”之意,wait是不及物动词,搭配介词for才能接宾语,await是及物动词,可以直接接宾语,故答案为C项。
转载请注明原文地址:https://kaotiyun.com/show/jhi4777K
0
考研英语二
相关试题推荐
ThewriterwarnsAmericansthat______.By"commonresources"(Paragraph2),theauthormeansthat______.
ThewriterwarnsAmericansthat______.Accordingtothepassage,ithaslongbeenbelievedthat______.
Immediatesolutionshouldbe______tosavethepeoplefromthefloodthathassweptsouthernChinathissummer.
ManyAmericansregardthejurysystemasaconcreteexpressionofcrucialdemocraticvalues,includingtheprinciplesthatallc
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
In1999,thepriceofoilhoveredaround$16abarrel.By2008,ithad【1】the$100abarrelmark.Thereasonsforthesurge【2】fro
Withthenation’sfinancialsystemteeteringonacliff.Thecompensationarrangementsforexecutivesofthebigbanksandother
Afewdecadesago,theworldbankingcommunityinventednewElectronicFundsTransfer(EFT)systemstomovemoneymoreefficiently
随机试题
对韩愈《送桂州严大夫》一诗中“江作青罗带,山如碧玉簪”,分析正确的是()。
2岁以内小儿乳牙数目正确的计算方法是
龈上边缘的主要优点是
编码耐药性的质粒是
患者男,55岁。肝硬化,腹水已消退,但是病人出现失眠,要求护士给予镇静安眠药。护士最好的解释是
根据下列资料,回答问题。2009年世界天然气贸易量达8768.5亿立方米,较2005年增长7.7%。其中管道天然气贸易量为6337.7亿立方米;液化天然气贸易量为2427.7亿立方米。俄罗斯是世界最大的管道天然气出口国,占管道天然气总出口量的27
从管理层面看,零售商业物业经营管理的核心内容是()
班级管理的主要模式有:( )、平等管理( )、和目标管理。
设随机变量X的概率密度为f(x)=,求Y=sinX的概率密度.
Whatwouldtheworldlooklikewithoutthedollardomination?USofficialsare【C1】______outadealtoendthegovernmentshutdow
最新回复
(
0
)