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
A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must us
A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must us
admin
2011-01-13
89
问题
A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300, 000 kilometers in one second. A radar set sends out a short burst of radio waves: Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word "radar," in fact, gets its name from the term "radio detection and ranging." "Ranging" is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms.
Which of the following would most likely be the topic of the next paragraph 1?
选项
A、Other uses of radar.
B、Uses of sonar technology.
C、Other technology used by pilots.
D、A history of flying.
答案
B
解析
推断题型通读全文可见本段开始介绍了飞行员在驾驶飞机时的局限,于是借助于雷达;接着介绍了雷达的工作原理,名字的来源,及其他功用等;由此判断有关介绍雷达的内容已告一段落,下一段应不会再讲雷达的其他功用(排除选项A);本段因是围绕雷达来写,尽管提到雷达对飞行员起到举足轻重的作用,但目的不是向飞行员介绍不同种类的科学技术(排除选项C);本段的目的也不是为了介绍飞行史(排除选项D);因此只有选项B (使用声纳/声波定位仪这一技术)较为可能;声纳与雷达的工作原理近似,但更多用于水中;由此可假定本段讲了在空中和陆地上雷达的功用,下一段可能要讲解水中利用这一原理——声纳的应用;选项B为答案。
转载请注明原文地址:https://kaotiyun.com/show/ly5O777K
本试题收录于:
CATTI三级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI三级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
Lumber(production)wasthe(mainindustry)inMichiganuntil(theearly)1900’s,(which)theautomobileindustrywasestablishe
A、Theyhaveonlyrecentlybeendiscovered.B、Theywerepaintedbythecolonistswhoknewher.C、Mostofthemportrayherasach
Psychoanalysisisaformoftherapy(thatattempts)(toeliminate)conflict(byalter)thepersonality(ina)positiveway.
OrganicArchitectureOneofthemoststrikingpersonalitiesinthedevelopmentofearly-twentiethcenturyarchitecturewasF
OvercomingtheLanguageBarrierThediscoverythatlanguagecanbeabarriertocommunicationisquicklymadebyallwhotra
OvercomingtheLanguageBarrierThediscoverythatlanguagecanbeabarriertocommunicationisquicklymadebyallwhotra
OvercomingtheLanguageBarrierThediscoverythatlanguagecanbeabarriertocommunicationisquicklymadebyallwhotra
Manyanimalscanmaintain______constantconditionsintheirinternalenvironment.
Agoodtranslatorisbydefinitionbilingual.Theoppositeisnot【C1】______tree,however.Abornandbredbilingualwillstilln
随机试题
免疫应答的发生场所是:
患儿,男,3岁。面色少华,不思纳食,形体偏瘦,舌淡苔薄白。其治法是
下列情境中,适宜推行参与管理的是()。
实际利率是以实物为标准计算的,即物价不变,货币购买力不变条件下的利率。()
小乘佛教又名上座部佛教,在理论和实践的基础体系上仍接近于原始佛教。()
已满十四周岁不满十六周岁的人,犯故意杀人、()、投毒罪的,应当负刑事责任。
上海市新闻出版局对特许出版物经营活动统一管理,按产品向世博会特许办申领防伪标识。特许办负责特许出版物的世博标识授权审批,新闻出版局负责出版物内容审批。特许办为经新闻出版局审批的产品提供授权审批的绿色通道。双方分别通过各自的零售渠道(含外省市零售通道),推进
战后列强围绕中国问题产生的矛盾及其表现。
在美国,每年接受治疗的精神忧郁症病人的人数超过200万人,是中国的接近10倍,而中国的人口则接近美国的10倍。以下各项如果为真,都有助于解释上述现象,除了:
MillionsofAmericansandforeignersseeG.I.Joeasamindlesswartoy,thesymbolofAmericanmilitaryadventurism,butthat’
最新回复
(
0
)