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
2015-11-27
38
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.
【C18】
选项
A、out
B、in
C、off
D、down
答案
C
解析
本句提到流动的微粒(streams of particles)盘旋(hover),通常物体离开地面后才能在空中盘旋。C项off与pop搭配后表示“突然离开”,表明离开地面。
转载请注明原文地址:https://kaotiyun.com/show/OazZ777K
0
考研英语一
相关试题推荐
Jacoby&Myers,apioneerinfightinginthe1970sforlawyers’righttoadvertise,embodieswhatmanypeopledislikeaboutAmer
Thefirstmanwho,havingenclosedapieceofground,remindedhimselfofsaying’Thisismine’,andfoundpeoplesimpleenough
Thefirstmanwho,havingenclosedapieceofground,remindedhimselfofsaying’Thisismine’,andfoundpeoplesimpleenough
AchillingfeatureofthesuicidevideoleftbyMohammadSidiqueKhan,theleaderofthebandthatkilledmorethan50peoplein
Insurancecompaniesprovideaservicetothecommunitybyprotectingitagainstexpectedandunexpecteddisasters.Beforeanins
Insurancecompaniesprovideaservicetothecommunitybyprotectingitagainstexpectedandunexpecteddisasters.Beforeanins
Insurancecompaniesprovideaservicetothecommunitybyprotectingitagainstexpectedandunexpecteddisasters.Beforeanins
Insurancecompaniesprovideaservicetothecommunitybyprotectingitagainstexpectedandunexpecteddisasters.Beforeanins
Marriage,anditsmanyupsanddowns,stilloften【C1】______theheadlinesonnewspapers,magazinesandtheairwaves.Nearly23mA
Marriage,anditsmanyupsanddowns,stilloften【C1】______theheadlinesonnewspapers,magazinesandtheairwaves.Nearly23mA
随机试题
35岁男性患者,患慢性肾炎已4年,加重伴少尿1周。血压180/100mmHg,内生肌酐清除率8.7ml/min,诊断为慢性肾小球肾炎慢性肾衰竭尿毒症期。对上述高危项目应选:择哪一项应急处理措施
可自由通过细胞膜的是
王某,28岁,未产妇,述说平素月经规律,28天一次,每次持续3~4次。其末次月经是2月11日,距今已有8周,现病人感觉疲乏,乳房触痛明显。除以上体征外,护士若考虑该妇女怀孕,其另外的可能的症状或体征是()
冷凝集素与红细胞结合最好的温度是
大气环境防护距离计算模式是基于估算模式开发的计算模式,此模式主要用于确定()。
大、中城市人民政府应当制定规划,对()限期使用天然气、液化石油气、电或者其他清洁能源。
电算化会计核算流程中的记账特点包括()。
()是目前应用最广泛的传动形式。
证券公司受理向客户融资融券业务申请后,应当办理客户征信,了解客户的身份、财产与收入状况、证券投资经验和风险偏好。客户征信调查内容一般应包括( )等。
2005年11月7日,中华人民共和国商务部发布了《酒类流通管理办法》,该《办法》第19条规定:“酒类经营者不得向未成年人销售酒类商品,并应在经营场所显著位置予以明示”;第30条规定:“违反本办法第19条规定的,由商务主管部门或会同有关部门予以警告,责令改正
最新回复
(
0
)