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
2021-10-14
23
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 the 2026.
Finding life on Mars would be an epochal【C19】________. The bragging rights that go with being first to make the find is part of what makes the planet the hot new【C20】________
【C3】
选项
A、provision
B、company
C、counterpart
D、comparison
答案
B
解析
名词辨析题。四个选项分别为[A]provision“规定,提供”;[B]company“伴随,陪伴”;[C]counterpart“对应的人或物”;[D]comparison“比较”。空格所在句意为“不过,此次发射的飞船会有很多________”,结合语境可知,前后文具有明显的转折意味,前文提到火星之行是“孤独的”,可据此猜测“此次发射的飞船将会有很多同伴”。此外,下段内容也提到其他国家也有火星探测任务,可以确定“美国宇航局有许多和它一样做类似探测任务的同伴”。结合四个选项,只有[B]符合题意,故答案为选项[B]。
转载请注明原文地址:https://kaotiyun.com/show/6CY4777K
0
考研英语二
相关试题推荐
Whichofthefollowingcanbethebesttitleofthispassage?Thephrase"synergisticeffect"inthelastparagraphisclosest
Excitement,fatigue,andanxietycanallbedetectedfromsomeone’sblinks,accordingtopsychologistJohnStern(21)Washington
Theauthorbelievesinthepassagethat______.Thepropertitleforthispassageshouldbe______.
IwasaddressingasmallgatheringinasuburbanVirginialivingroom-awomen’sgroupthathadinvitedmentojointhem.Through
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
Accordingtothesituationbelow,writeanessaytomakeyourcomment.Yourcompositionshouldbemorethan150words.中国有世界上最多
Theroleofgovernmentsinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresou
Shouldaleaderstrivetobelovedorfeared?Thisquestion,famouslyposedbyMachiavelli,liesattheheartofJosephNye’sne
Williamshadnotbeenthereduringthe_____momentswhenthekidnappinghadtakenplace.
随机试题
相对不适合行人工股骨头置换术的是:
消化性溃疡出血,量约50ml食管静脉曲张破裂出血,量约1000ml
留置胸膜腔闭式引流管的病人出现引流管脱出,首先要
关节脱位的专有体征包括()。
金某可以行使哪些权利?孙某将马牵回来后,即将马租给了王某,王某利用该马拉游客玩,获得100元报酬,并且马在王某这里怀孕,经王某悉心照料,产下小马。以下说法正确的是:
为了保证某工程在“五一”前竣工,建设单位要求施工单位不惜一切代价保证工程进度,对此,下面说法正确的是()。
下列各项中,属于后向一体化战略主要适用条件的有()。(2015年)
假设ABC公司股票目前的市场价格为24元,而在一年后的价格可能是35元和16元两种情况。再假定存在一份100股该种股票的看涨期权,期限是一年,执行价格为30元。购进上述股票且按无风险利率10%借人资金,同时售出一份100股该股票的看涨期权。要求:若目
Readthisnotefromyourboss,Mr.AndrewPeterson.December11th20
A、Teacherandstudent.B、Husbandandwife.C、Doctorandpatient.D、Shopassistantandcustomer.C本题的问题关键词是relationship。对话中提到感冒、
最新回复
(
0
)