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
22
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
A、thepaperisamemberofalargepressassociationB、thepaper’sethicalstandardsaresuspectedC、thepaperisinfinancialt
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentup-and-comingcounterpartyliquidityim
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentup-and-comingcounterpartyliquidityim
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
LightningCloud-to-groundlightningboltsareacommonphenomenon,about100strikeEarth’ssurfaceeverysinglesecond,yet
Peopleinwealthiernationsstronglysupportedthegovernmentstodomoretohelp.
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarriedandchildlesswomenarethehappiestsubgroupinthe
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarriedandchildlesswomenarethehappiestsubgroupinthe
随机试题
根据旅游服务工作的特点,服务人员的注意力应该是()。
甲公司2×16年度财务报表于2×17年3月20日经董事会批准对外提供。2×17年1月1日至3月20日,甲公司发生的有关交易或事项如下:(1)2×17年1月20日,法院对乙公司就2×16年8月起诉甲公司侵犯知识产权案件作出终审判决,甲公司需支付乙公司的赔偿超
根据《食品卫生法》,未取得卫生许可证而从事食品生产经营活动的,应处以()。
明代诗人杨宏的诗:“夏日炎忘暑,冬游却似春。源流虽一派,清白只垂云"描写的是()。
义务教育阶段英语课程的总目标:通过英语学习使学生形成初步的______,促进心智发展.提高综合人文素养。
Ihaveheardalotofgoodthingsaboutyou______Icamebackfromabroad.
甲、乙两车分别从A、B两地出发,相向而行,出发时,甲、乙的速度比是5:4,相遇后,甲的速度减少20%,乙的速度增加20%,这样,当甲到达B时,乙离A地还有10千米,那么A、B两地相距多少千米?
在目前为止,微型计算机经历的几个阶段?
Nancy:HaveyouheardaboutDana?SheisgoingtogetmarriedtoGraham!Scott:________
A、Aslongashewants.B、ByTuesday.C、ByThursday.D、kdependsonthedate.D判断题。w问书你能借多久,M回答按书卡片上的时间还,否则会被罚款的。所以答案为D。
最新回复
(
0
)