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 weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather
A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather
admin
2010-06-30
58
问题
A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time.
All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues information about approaching storms, floods, frosts, droughts, and all climatic conditions in general. Twice a month it issues a 30-day "outlook" which is a rough guide to weather conditions likely to occur over broad areas of the United States. These 30-day outlooks are based upon an analysis of the upper air levels with often set the stage for the development of air masses, fronts, and storms.
Considerable effort is being exerted today to achieve more accurate weather predictions. With the use of electronic instruments and earth satellites, enormous gains have taken place recently in identifying and tracking storms over regions which have but few meteorological stations. Extensive experiments are also in progress for weather modification studies. But the limitations of weather modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced additional orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements.
At the present time, experiments are being conducted in ______.
选项
A、30-day "outlook"
B、controlling storms
C、satellites
D、manipulating weather
答案
D
解析
文中第三段第三句说“在改造天气的研究中人们进行了许多实验”,D项与此意相符,所以选项D为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/FsJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Genetherapyandgenebaseddrugsaretwowayswecouldbenefitfromourgrowingmasteryofgeneticscience.Buttherewillbeo
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Averyimportantworldproblem—infact,Ithinkitmaybemostimportantofallthegreatworldproblemswhichfaceusatthepr
Culturalglobalization,formany,meansWesternizationorAmericanization.Animportantdistinctionconcerningtoday’scultural
ThepagesoftheHarvardBusinessReviewarenotusuallypopulatedbynovelists.ButJosephFinderisjustsuchararity.Recent
WorldleadersmetrecentlyatUnitedNationsheadquartersinNewYorkCitytodiscusstheenvironmentalissuesraisedattheRio
WorldleadersmetrecentlyatUnitedNationsheadquartersinNewYorkCitytodiscusstheenvironmentalissuesraisedattheRio
TherewasnotanytobaccoinSpainuntil______.
Whowillspeakupforinternationalcapitalism?Governmentsandbusinesses.Whatapitythatis!Thesesupposeddefendersofglo
Humour,whichoughttogiverisetoonlythemostlight-heartedandgayfeelings,canoftenstirupvehemenceandanimosity.Evi
随机试题
在社会学主要理论流派中,代表人物是本雅明、霍曼斯、霍克海默等人的社会理论是()
据此可诊断为提示有肺动脉高压的是
生物氧化指
肢体抬高试验阳性是指
公路工程质量控制关键点要根据哪些文件和资料的要求设置?工程技术总负责人负责对技术文件、报告、报表进行审核和分析是否妥当?如不妥,应由谁负责?
背景资料:高新技术企业新建一栋8层框架结构办公楼工程,采用公开招标的方式选择A施工单位作为施工总承包,并按照《建设工程施工合同(示范文本)》(GF—2013—0201)签订施工合同。合同中约定钢筋、水泥等由业主供应,其他结构材料及装饰装修材料均由
期货合约的交割地点是由交易双方协商确定的。()
战国时期最有实力的七个诸侯国家被称为“战国七雄”,他们分别是()。
[2007年GRK真题]老林被誉为“股票神算家”。他曾经成功地预测了1994年8月“井喷式”上升行情和1996年下半年的股市暴跌,这仅是他准确预测股市行情的两个实例。回答以下哪个问题对评价以上陈述最有帮助?
Thelongyearsoffoodshortageinthiscountryhavesuddenlygivenwaytoapparentabundance.Storesandshopsarechokedwith
最新回复
(
0
)