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
77
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】________.
【C7】
选项
A、delayed
B、cancelled
C、postponed
D、prolonged
答案
C
解析
动词辨析题。四个选项分别为A项delayed“(强调因客观外部因素)推迟”;B项cancelled“取消”;C项postponed“(强调主动地且有计划地安排)推迟”;D项prolonged“延长(指把时间延长至超过正常或通常的限度)”。根据原文“由于降落伞和航空电子设备方面的工程问题,该项目已经________到2022年”可知,是因为尚未解决降落伞等问题主动将此计划安排延期,四个选项只有C项符合题意,故答案为C项。
转载请注明原文地址:https://kaotiyun.com/show/ghi4777K
0
考研英语二
相关试题推荐
ThewriterwarnsAmericansthat______.By"commonresources"(Paragraph2),theauthormeansthat______.
Studythefollowingchartscarefullyandwriteanessayinwhichyoushould:1)describethechartsbriefly,2)interpretthec
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
In1999,thepriceofoilhoveredaround$16abarrel.By2008,ithad【1】the$100abarrelmark.Thereasonsforthesurge【2】fro
In1999,thepriceofoilhoveredaround$16abarrel.By2008,ithad【1】the$100abarrelmark.Thereasonsforthesurge【2】fro
ManyAmericansregardthejurysystemasaconcreteexpressionofcrucialdemocraticvalues,includingtheprinciplesthatallc
Withthenation’sfinancialsystemteeteringonacliff.Thecompensationarrangementsforexecutivesofthebigbanksandother
Afewdecadesago,theworldbankingcommunityinventednewElectronicFundsTransfer(EFT)systemstomovemoneymoreefficiently
Afewdecadesago,theworldbankingcommunityinventednewElectronicFundsTransfer(EFT)systemstomovemoneymoreefficiently
随机试题
支气管肺炎引起脑水肿的原因
在考生文件夹下有一个数据库文件“samp2.accdb”,里面已经设计好3个关联表对象“tCourse”、“tGrade”、“tStudent”和一个空表“tTemp”,请按以下要求完成设计:创建一个查询,查找并显示含有不及格成绩的学生的“姓名”、“
NursingatBethIsraelHospitalthebestpatientcarepossible.Ifwearetosolvethenursingshortage,hospitaladministration
下列有关胸外按压的说法正确的是
患者,男,36岁,因从高处坠地致四肢麻木、不能行走5天入院,经检查诊断为第5颈椎骨折并脱位,拟急症行椎管探查,骨折复位固定术。
全科医生的工作任务包括
足三阴经在内踝上8寸以上部位排列是
黄疸患者,身目俱黄,黄色鲜明,恶心欲吐,发热恶寒,无汗身痛,小便短赤,舌苔薄黄腻,脉弦滑。治疗应首选
根据增值税法律制度的规定,下列关于增值税纳税义务发生时间的表述中,不正确的是()。
在2010上海世博会的城市未来馆内,一款电子纸的展品让人们看到了未来纸的发展趋势。这款电子纸仅有几毫米的厚度,由半导体有机材料制成,可弯曲,他与其他电子屏幕不一样,电子纸不需要背光,利用自然光反射即可阅读内容。科技的发展日新月异,并直接决定着媒介发展的未来
最新回复
(
0
)