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
2023-01-24
47
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.
【C10】
选项
A、even
B、fast
C、difficult
D、comfortable
答案
C
解析
本句提到月尘闻起来像火药(it smelled like gunpowder),火药的味道一般是很浓并让人呼吸不畅。C项difficult “困难的”,代入后指呼吸困难。A项even、B项fast和D项comfortable分别表示“均匀的”、“快速的”和“舒服的”,闻起来像火药的月尘不会使人呼吸均匀或舒服,也不会使呼吸加快。
转载请注明原文地址:https://kaotiyun.com/show/PJMD777K
0
考研英语二
相关试题推荐
很多人认为网恋不靠谱。芝加哥大学的一个研究小组对1.9万名在2005—2012年间结婚的美国人进行在线调查后发现,超过三分之一的人是通过约会网站或Facebook等社交网络与其配偶认识的;这些被调查对象总的离婚率远低于平均离婚率。这项调查表明,网恋在成就稳
Skepticsofhighereducationoftencomplainthatuniversitiesoffertoomanyboringdegreeswithlittlevalueintheworkplace.【
Skepticsofhighereducationoftencomplainthatuniversitiesoffertoomanyboringdegreeswithlittlevalueintheworkplace.【
Overthecourseofmanyyears,withoutmakinganygreatfussaboutit,theauthoritiesinNewYorkdisabledmostofthecontrol
A.HelptodetectasuspectB.DiscoverthepotentialhealthproblemsearlierC.RevealtheunknownsofthefamilyD
Happypeopleworkdifferently.They’remoreproductive,morecreative,andwillingtotakegreaterrisks.Andnewresearchsugge
Happypeopleworkdifferently.They’remoreproductive,morecreative,andwillingtotakegreaterrisks.Andnewresearchsugge
Happypeopleworkdifferently.They’remoreproductive,morecreative,andwillingtotakegreaterrisks.Andnewresearchsugge
Happypeopleworkdifferently.They’remoreproductive,morecreative,andwillingtotakegreaterrisks.Andnewresearchsugge
Peekthroughtheinspectionwindowsofthenearly100three-dimensional(3D)printersquietlymakingthingsatRedEye,acompany
随机试题
前角γo>0°的铣刀切削刃可用()铣削。
动物亚硝酸盐中毒时,末梢血液呈
用微量凯氏定氮法测出某肉类制品含氮量为4%,其蛋白质含量为
肝郁气滞证临床表现应除外下列哪项()
支气管扩张患者咳嗽、咳痰加重的时间是
()负责公司的日常经营活动。
下列关于多种产品加权平均边际贡献率的计算公式中,错误的是()。
以下园林中属于岭南园林代表的是()。
1,3,4,8,15,27,()
Whatdidthespeakertalkaboutlasttime?
最新回复
(
0
)