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 or four maps presents a continuous picture of weather
A weather map is an important tool for geographers. A succession of three or four maps presents a continuous picture of weather
admin
2011-02-28
71
问题
A weather map is an important tool for geographers. A succession of three or four maps presents a continuous picture of weather changes. Weather forecasters 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, fronts 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 which 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 orographic precipitation on the windward side of mountain ranges. Nevertheless they have provided a clearer understanding of the fundamentals of weather elements.
The word" gains" in the second sentence in the last paragraph means ______.
选项
A、increases
B、progresses
C、profits
D、things
答案
B
解析
根据上下文可知,人们付出了巨大的努力,因此天气预报(比过去)变得更准确了,可见天气预报能力有了很大进步,因此选[B] 。
转载请注明原文地址:https://kaotiyun.com/show/NOtd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Inthepastdecade,newscientificdevelopmentsincommunicationshavechangedthewaymanypeoplegatherinformationaboutpoli
Interlocutor:Now,I’mgoingtogiveeachofyouadifferentpictureandI’dlikeyoutofirstdescribeitandthentelluswhat
Readthetextsfromanarticleinwhichfivepeopletalkedaboutsmoking.Forquestions61~65,matchthenameofeachpersonto
Whataretheytalkingabout?
Whydidthewoman’sfamilymovetoOxford?
Whatisthesubjectofthisconversation?
Whatdoesthewomandislikeabouttravelingbyair?
Smokingisconsidereddangeroustothehealth:Ourtobacco-sellerMr.Johnson,therefore,alwaysaskshiscustomers,iftheyare
Smokingisconsidereddangeroustothehealth:Ourtobacco-sellerMr.Johnson,therefore,alwaysaskshiscustomers,iftheyare
Smokingisconsidereddangeroustothehealth:Ourtobacco-sellerMr.Johnson,therefore,alwaysaskshiscustomers,iftheyare
随机试题
Onedayafarmerboughtfourdonkeysatthemarketplaceinthevillage.Hegot【56】thebackofoneof【57】andbegantotidehome.
脉内的气是指()脉外之气是指()
罗某从外地采购一批玉米存放在一粮食仓库销售,甲市乙区技术监督局接到这批玉米已发生霉变举报后,即派员前往现场检查核实。该局人员对这批玉米全部进行查封,并从这批玉米中抽出四袋样品送检,制作了现场笔录。罗某对此不服,向法院提起行政诉讼。据此,回答下列问题。如
以下属于征收、征用集体土地政策规定的有()。
采用低正常股利加额外股利政策的意义有()。
G20金融消费者保护十项基本原则中,()原则表示所有的利益相关者都应参与金融教育,应当使消费者容易获取与消费者保护、消费者权利和义务相关的信息。
根据增值税法律制度的规定,下列行为中,涉及的进项税额不得从销项税额中抵扣的是()。
下面是某求助者的WAIS—RC测验结果:在该求助者测验结果中,算术分测验的百分等级是()。
如果我们必须用一句话给免疫系统下个定义,答案一定是“识别非我的机制”。这是免疫系统最核心的部分,其余的东西,比如抗体的形成或者巨噬细胞消灭敌人的能力,都必须建立在这个机制之上。换句话说,只要生命体能够将敌人辨认出来,剩下的事情就好办了,目前医学界遇到的最难
软件的调试方法主要有:强行排错法、______和原因排除法。
最新回复
(
0
)