首页
登录
职称英语
A weather map is an important tool for geographers. A succession of three or
A weather map is an important tool for geographers. A succession of three or
游客
2023-09-01
57
管理
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. [br] The observation of weather conditions by satellites is advantageous be cause it ______.
选项
A、uses electronic instruments
B、enables man to alter the weather
C、makes weather prediction easier
D、gives the scientist information not obtained readily otherwise
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2977010.html
相关试题推荐
Manyofthemostdamagingandlifethreateningtypesofweathertorrentialr
【B1】______[br]【B11】______[originaltext]OneofAmerica’smostimportant(26
【B1】______[br]【B10】______[originaltext]OneofAmerica’smostimportant(26
【B1】______[br]【B9】______[originaltext]OneofAmerica’smostimportant(26)
【B1】______[br]【B8】______[originaltext]OneofAmerica’smostimportant(26)
【B1】______[br]【B6】______[originaltext]OneofAmerica’smostimportant(26)
【B1】______[br]【B5】______[originaltext]OneofAmerica’smostimportant(26)
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
随机试题
[audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_006[/audioFiles]
患者胆怯易惊,虚烦不眠,偶有眩晕,苔白腻,脉弦滑。治疗应首选的方剂是()。
翟希贤根据合唱作品( )A.《草原上升起不落的太阳》 B.《牧歌》 C.《
风险应对是指风险应对策略的选择,根据风险分析结果,结合风险承受度,权衡风险与收益
急性肾衰病人的饮食护理中错误的是A、高热量 B、充足维生素 C、忌含钾丰富的
根据《刑法》规定,单位受贿罪的主体有( )。 ?A、国家机关 B、国有公司
一般来说,不受意识支配的神经是()。A.运动神经 B.中枢神经 C.交感神
下列药物中不属于抗抑郁药物的是A.马普替林 B.西酞普兰 C.多奈哌齐 D
哪一项是指下颌向各个方向所做最大范围的运动?A、开闭口运动 B、前后运动 C
下列选项中,劳动者可以单方面解除劳动合同的情形包括()。 A.用人单
最新回复
(
0
)