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
2017-08-11
26
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.
【C3】
选项
A、hang .
B、crash
C、land
D、move
答案
B
解析
本句说明月尘是如何形成的。从后面的伴随状语heating its rocks and dirt…to fine particles(将石块和尘土加热并粉碎成颗粒)推断,流星对月球表面造成了极大冲击,导致这样的后果。B项crash意为“撞击”,符合语义逻辑。
转载请注明原文地址:https://jikaoti.com/ti/1pr7FFFM
0
考研英语一
相关试题推荐
Formanandwomenunder30,smokingdoesnotpreventtypicalage-relatedweightgain,accordingtoastudyofnearly4,000white
TheUnitedStateseconomyproducedroughly$15trillionworthofgoodsandservicesin2008,makingiteasilythelargestinthe
TheUnitedStateseconomyproducedroughly$15trillionworthofgoodsandservicesin2008,makingiteasilythelargestinthe
【F1】Toexplainwhysomecountriesgrowmorerapidlythanothersorwhyacountrymaygrowmorerapidlyduringoneperiodofhist
Mr.Porter,aprofessoratHarvardBusinessSchool,isoneoftheworld’smostrespectedbusinessthinkers.Hemadehisnameand
Recentyearshavebroughtminority—ownedbusinessesintheUnitedStatesnotonlyunprecedentedopportunitiesbutalsonewands
Recentyearshavebroughtminority—ownedbusinessesintheUnitedStatesnotonlyunprecedentedopportunitiesbutalsonewands
Optimistsoutlivepessimists,anewstudyshows.Ofnearly100,000women【C1】______intheWomen’sHealthInitiative,thosewhoga
Optimistsoutlivepessimists,anewstudyshows.Ofnearly100,000women【C1】______intheWomen’sHealthInitiative,thosewhoga
Optimistsoutlivepessimists,anewstudyshows.Ofnearly100,000women【C1】______intheWomen’sHealthInitiative,thosewhoga
随机试题
在《张中丞传后叙》中,写南霁云抽刀断指时,“一座大惊,皆感激为云泣下”,对刻画南霁云形象来说,这种表现手法是()
德育过程的主要矛盾是教育者提出的道德要求同受教育者_______之间的矛盾。
省牙防组流调小分队到某市郊区县进行口腔健康调查,大家认真讨论了调查方案和步骤方法,就下面的各个环节提出了具体措施。
某银行从业人员因突然有急事离开,未按职责管理规定将自己保管的印章和钥匙交与同事,针对此事的正确评价为()。
在急救包扎时,下列哪些受伤部位宜采用环形包扎?()
《关于切实减轻中小学生过重课业负担》规定:小学每天的教育教学活动总量不超过()。
( )是公安工作的根本路线。
我国警衔等级的设置是()。
Themediadirectorisresponsibleforthefollowingexcept______.Bothadsofferclearinformationaboutthefollowingexcept
曲线上对应于点处的法线方程是____________.
最新回复
(
0
)