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
外语
When you look up, how far back in time do you see? Our senses are【C1】______ in the past. There’s a flash of lightning, and th
When you look up, how far back in time do you see? Our senses are【C1】______ in the past. There’s a flash of lightning, and th
admin
2020-12-01
26
问题
When you look up, how far back in time do you see?
Our senses are【C1】______ in the past. There’s a flash of lightning, and then seconds pass until we【C2】______ the rumble of distant thunder. We hear the past. We are seeing into the past too.
【C3】______ sound travels about a kilometer every three seconds, light travels 300,000 kilometers every second. When we see a flash of lighting three kilometers away, we are seeing something that happened a hundredth of a millisecond ago. That’s not exactly the distant past.
But as we look further afield, we can peer further back.【C4】______ through a telescope, we can look even further into the past. If you really want to look back in time, you need to look up.
The Moon is our nearest celestial neighbor — a world with valleys, mountains and craters. It’s also about 380,000km away, so it takes 1.3【C5】______ for light to【C6】______ from the Moon to us. We see the Moon not as it is, but as it was 1.3 seconds ago.
The Moon doesn’t change much from instant to instant, but this 1.3-second delay is【C7】______ when mission control talks to astronauts on the Moon. Radio waves travel at the speed of light, so a message【C8】______ mission control takes 1.3 seconds to get to the Moon, and even the quickest of【C9】______ takes another 1.3 seconds to come back.
It’s not【C10】______ to look beyond the Moon and further back in time. The Sun is about 150 million km away, so we see it as it was about 8 minutes ago.
Even our nearest planetary neighbors, Venus and Mars, are tens of millions of kilometers away,【C11】______ we see them as they were minutes ago. When Mars is very【C12】______ to Earth, we are seeing it as it was about three minutes ago, but at other times light takes more than 20 minutes to travel from Mars to Earth.
This【C13】______ some problems if you’re on Earth controlling a Rover on Mars. If you’re driving the Rover at 1km per hour then the lag,【C14】______ to the finite speed of light, means the Rover could be 200 meters ahead of【C15】______ you see it, and it could travel another 200 meters after you command it to hit the brakes.
Not surprisingly, Martian Rovers aren’t breaking any speed records, travelling at 5cm per second (0.18kph or 0.11 mph). On-board computers help with driving, to prevent rover wrecks with rovers following carefully【C16】______ sequences and using on-board computers to【C17】______ hazards and prevent punctures.
Let’s go a bit further out in space. At its closest to Earth, Saturn is still more than a billion kilometers away, so we see it as it was【C18】______ than an hour ago.
When the world【C19】______ into the Cassini spacecraft’s plunge into Saturn’s atmosphere in 2017, we were hearing echoes from a spacecraft that had already been destroyed more than an hour before.
So when you look up, remember you aren’t seeing things as they are【C20】______; you’re seeing things as they were.
【C14】
选项
A、use
B、lead
C、due
D、take
答案
C
解析
词语搭配。此句意为“如果探测车以每小时一公里的速度前进,由于光的传播速度是一定的,通过计算时间延迟,可以推测出它的实际位置可能比我们看到的更靠前200米”。due to为固定搭配,意为“由于”,故只有C选项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/AwMO777K
本试题收录于:
CATTI二级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI二级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternationalMonetaryFundmacro-economicfundamentals
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternationalMonetaryFundmacro-economicfundamentals
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentup-and-comingcounterpartyliquidityim
USPoliticiansDebate"NetNeutrality"VocabularyandExpressionssuspendfuel(v.)unleashWhatpreventsPresidentObam
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarriedandchildlesswomenarethehappiestsubgroupinthe
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarriedandchildlesswomenarethehappiestsubgroupinthe
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarriedandchildlesswomenarethehappiestsubgroupinthe
随机试题
如何做好后进生的教育工作?
对于高血压急症宜选用
某采用光气法生产聚碳酸醋的项目,大气环境影响评价等级为一级,该项目污染源核算必须包含的内容有()。
产品方案需要在()研究基础上形成。
背景资料:某建筑公司(乙方)于4月20日与某厂(甲方)签订了修建建筑面积为3000m2工业厂房(带地下室)的施工合同,乙方编制的施工法案和进度计划已获监理工程师批准。该工程的基坑开挖土方量为4500m3,假设直接费用为4.2元/m3,综合费率为直接费的2
投资者在计算基金投资收益率时,应考虑的因素有()。
教育法是调整教育关系的法律规范的总和。()
根据下列资料,回答问题。2014年甲、乙、丙、丁、戊五市GDP增长率比2013年同期分别提高了5.4个、2.6个、2.2个、2个和2.6个百分点。2014年第一季度GDP总量和增长率按城市排名,均居同位的有()。
诊断尿路结石首选的X线检查方法是
SNASummerBlockPartySouthdaleNeighborhoodAssociation(SNA)invitesallresidentstoadaylongblockpartyonMarigoldStreet
最新回复
(
0
)