Weather Map 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. 1 One characteristic of weather maps not mentioned by the author in this passage is . A wind speed B thermal changes C fronts D barometric pressure 2 The thirty-day forecast is determined by examining . A upper air levels B satellite reports C changing fronts D daily air maps 3 The observation of weather conditions by satellites is advantageous because it . A gives the scientist information not obtained readily otherwise B enables man to alter the weather C uses electronic instruments D is modern 4 A weather map is synoptic because it . A summarizes a great deal of information B can be interpreted accurately C appears daily D shows changing fronts 5 At the present time, experiments are being conducted in . A 30-day outlook B controlling storms C satellites D manipulating weather 参考答案 1. B2. A3. D4. A5. D
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:完形填空考点归纳
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:专题讲练四:动词和短语动词
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:突破专题——短文改错
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:情态动词考题的三条技巧
安徽省明光英普辅导中心高考英语二轮复习精品课件:交际用语
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:考纲重要词汇联系复习3
安徽省明光英普辅导中心高考英语二轮复习精品课件:动词的时态和语态
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:考前必写350个常用难词
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:通过例句巧学高中词汇98句
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:陷阱题总结归纳-情态动词精讲精练
安徽省明光英普辅导中心高考英语一轮总复习课件:Units3133
安徽省明光英普辅导中心高考英语二轮复习精品课件:定语从句与状语从句
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:考纲重要词汇联系复习
安徽省明光英普辅导中心高考英语二轮复习精品课件:冠词
安徽省明光英普辅导中心高考英语一轮复习精品资料课件:Unit1 Lifestyles 生活方式
安徽省明光英普辅导中心高考英语二轮复习精品课件:代词
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:陷阱题总结归纳——介词
安徽省明光英普辅导中心高考英语二轮复习精品课件:主谓一致与倒装句
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:与“嫦娥一号”有关的词汇
安徽省明光英普辅导中心高考英语二轮复习精品课件:动词与动词短语
安徽省明光英普辅导中心高考英语二轮复习精品课件:名词
安徽省明光英普辅导中心高考英语二轮复习精品课件:名词性从句
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:书面表达常用语句集锦
安徽省明光英普辅导中心高考英语一轮复习精品资料课件:Unit2 Heroes 英雄
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:考纲重要词汇联系复习1
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:考纲重要词汇联系复习4
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:高效备考精品资料四
安徽省明光英普辅导中心高考英语二轮复习精品课件:介词与连词
浙江省金华市孝顺高级中学2016届高考英语语法专题复习:语法专题 it的用法
安徽省明光英普辅导中心高考英语二轮复习精品课件:形容词与副词
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |