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
2013-04-15
45
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 deter mine 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 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 modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced ad ditional orographic (山岳形态的) precipitation (山岳雨) on the windward side of mountain ranges. Nevertheless, they have provided a clearer under standing of the fundamentals of weather elements.
The thirty-day forecast is determined by examining ______.
选项
A、daily weather maps
B、upper air levels
C、satellite reports
D、changing fronts
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/G2B7777K
0
大学英语六级
相关试题推荐
SmokeandMinorsMoreteenagegirlssmokethanboys.Coulditbebecausethetobaccoindustryplaysontheirdesiretolookfun,
A、Silentreadinghadnotbeendiscovered.B、Fewpeoplecouldreadforthemselves.C、Peoplereliedonreadingforentertainment.
A、Quarrelingaboutapicture.B、Lookingfortheircat.C、Arrangingthehouse.D、Repairingtheirfurniture.C选项均为现在分词短语表明,本题可能考查正
A、Becausethisisanoldtraditionalsayingaboutfood.B、Becauseitcanremindpeopletoconcerntheirdiet.C、Becauseitcanr
A、Theyusuallysay"Idon’tknow"inordertosavetime.B、Theymaygiveatouristawronganswersoastobepolite.C、Theycon
Therunner______(被剥夺了金牌)formen’s100-meterdashatthegamesbecausehewasfoundtohavetakenstimulants.
Businessandgovernmentleadersconsidertheinflationratetobeanimportantindicator.Inflationisaperiodofincreased【C1】
Businessandgovernmentleadersconsidertheinflationratetobeanimportantindicator.Inflationisaperiodofincreased【C1】
DisneyWorld:CitiesofSimulationasPostmodernUtopias(乌托邦)WhatistheessenceofDisneyWorld?Muchofitrevolvesarou
随机试题
用人单位因生产经营状况发生困难而裁减人员,从裁减人员之日起几个月内新招人员时,在同等条件下应当优先录用本单位被裁减人员()
一次,我正在布置作业:“每个生字写5遍。”就听有个同学小声说:“都会写了,还让写!”我没说话就下课了。但这件事引起了我的反思,在班会上,我提出了“教师怎样留作业?”的问题。经过商讨,同学们一致同意:常规性的作业应该写,但可以根据自己对知识掌握的程度决定多写
某教师经常公开对学生说:“读书考大学,是为了自己,不是为了别人。好好读书将来能找到一个好的工作,挣下大把的钱,可以娶一个漂亮的老婆,生一个聪明的儿子,可以生活愉快、人生充实、前途美好、事业辉煌。所以,我强调读书是为了自己。”该教师的这种观点,违背了我国依法
卡方检验主要是用来处理()
一般VLAN的划分的根据有端口,MAC地址,网络层,IP组播。请简要分析这几种方式的特点。简要说明汇聚链接是如何实现跨越交换机间的VLAN的。
若使用REPLACE命令时,起范围子句为ALL或REST,则执行该命令后,记录指针指向()。
下列是if语句的基本形式:if(表达式)语句其中“表达式”()。
考生文件夹下存在一个数据库文件“samp3.accdb”,里面已经设计好表对象“tNorm”和“tStock”,查询对象“qStock”和宏对象“ml”,同时还设计出以“tNorm”和“tStock”为数据源的窗体对象“fStock”和“fNorm”。具体
Ihadtotakeastep,eventhoughIunderstandthatthatstepwasinthedirectionof______ratherthansuccess.(2003年西南财经大学考博试题
Namedafteranex-GovernorofNewSouthWales,SydneyistheState’scapitalcity.Locatedonthesouth-eastcoastofAustralia
最新回复
(
0
)