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
When Neil Armstrong and Buzz Aldrin returned from the moon, their cargo included nearly fifty pounds of rock and soil, which wer
When Neil Armstrong and Buzz Aldrin returned from the moon, their cargo included nearly fifty pounds of rock and soil, which wer
admin
2017-02-17
32
问题
When Neil Armstrong and Buzz Aldrin returned from the moon, their cargo included nearly fifty pounds of rock and soil, which were packed in an aluminum box with seals designed to maintain the lunar surface’s low-pressure environment. But back at Johnson Space Center, in Houston, scientists discovered that the seals had been【C1】______—by moon dust.
Lunar dust is fine, like a powder,【C2】______it cuts like glass. It’s formed when shooting stars【C3】______on the moon’s surface, heating its rocks and dirt and reducing them to fine particles. Since there’s no wind or water to smooth【C4】______edges, the tiny grains are sharp and uneven, and【C5】______nearly everything.
"The intruding【C6】______of lunar dust represents a more challenging engineering design issue, as well as a【C7】______issue for settlers, than does radiation," wrote Harrison Schmitt, an Apollo 17 astronaut, in his 2006 book, "Return to the Moon." The dust damaged space-suits and ate away layers of moon boots. Over the【C8】______of six Apollo missions, not one rock box【C9】______its vacuum seal. Dust followed the astronauts back into their ships, too. According to Schmitt, it smelled like gunpowder and made breathing【C10】______. No one knows precisely what the extremely small particles do to human lungs.
The dust not only【C11】______the moon’s surface, but floats up to sixty miles【C12】______it—as an outer part of its atmosphere, where particles【C13】______the moon by gravity, but are so thin that they【C14】______collide. In the nineteen-sixties, Surveyor probes filmed a glowing cloud floating just above the lunar surface during sunrise. Later, Apollo 17 astronaut Gene Cernan, while orbiting the moon, recorded a【C15】______phenomenon at the sharp line where lunar day meets night. Cernan【C16】______a series of pictures illustrating the changing【C17】______; streams of particles popped【C18】______the ground and hovered, and the resulting cloud came into sharper focus as the astronauts’ orbiter approached daylight. Since there’s no wind to form and【C19】______the clouds, their origin is something of a mystery. It’s【C20】______that they’re made of dust, but no one fully understands how or why they do their thing.
【C8】
选项
A、moment
B、situation
C、course
D、program
答案
C
解析
Over有“在……期间”之意,其宾语应能表示一段时间。C项course表示“过程,进程”,代入后表示在六次阿波罗航行任务中。
转载请注明原文地址:https://kaotiyun.com/show/PkEZ777K
0
考研英语一
相关试题推荐
Ininterviews,famouspeopleoftensaythatthekeytobecomingbothhappyandsuccessfulisto"dowhatyoulove."Butmasterin
IsStanfordstillauniversity?TheWallStreetJournalrecentlyreportedthatmorethanadozenstudentshaveleftschooltowo
IsStanfordstillauniversity?TheWallStreetJournalrecentlyreportedthatmorethanadozenstudentshaveleftschooltowo
IsStanfordstillauniversity?TheWallStreetJournalrecentlyreportedthatmorethanadozenstudentshaveleftschooltowo
Airpollutionkilledaboutsevenmillionpeoplelastyear,makingittheworld’ssinglebiggestenvironmentalhealthrisk,theW
Airpollutionkilledaboutsevenmillionpeoplelastyear,makingittheworld’ssinglebiggestenvironmentalhealthrisk,theW
Airpollutionkilledaboutsevenmillionpeoplelastyear,makingittheworld’ssinglebiggestenvironmentalhealthrisk,theW
ForyearsAmericanconversationaboutIraqhasincludedarefrainabouthowwecannotexpecttocreateaJeffersoniandemocracy
Nearlythree-quarteroftheEarthiscoveredwithwater.The【B1】______ofthecontinents,especiallyinthetemperatezones,isv
随机试题
免疫性不育常见的病因一般不包括
Appliedresearch,undertakentosolvespecificpracticalproblems,hasanimmediateattractivenessbecausetheresultscanbese
截瘫患者利用腋杖步行时,不包括
A.麻黄碱B.秋水仙碱C.小檗碱D.氧化苦参碱E.汉防己甲素
转关当事人有哪些义务?
根据《企业会计准则第28号——会计政策、会计估计变更和差错更正》的规定,下列各项中,会计处理正确的有( )。
信息反馈系统()。
《中华人民共和国婚姻法》规定,结婚的禁止条件是()。
Myunclehasn’tbeenabletoquitsmoking,butatleasthehas______.
Adietrichinproteinisthebestwaytoloseweight,leadingnutritionalscientistswillsaytoday.Millionscouldkeepintri
最新回复
(
0
)