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
2012-09-27
58
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 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 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 orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements.
The observation of weather conditions by satellites is advantageous because it______.
选项
A、gives the scientist information not obtained readily otherwise
B、enables man to alter the weather
C、uses electronic instruments
D、is modern
答案
A
解析
本文第二段第二句提到运用卫星,科学家可以对只有很少气象站的地区的气象进行分析、判断,这与答案[A]意思相近,所以本题正确答案应当为[A]。
转载请注明原文地址:https://kaotiyun.com/show/lrxd777K
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
Duringtheearlyperiodoftheearth’shistory,theweatheronearthapparentlyfluctuatedbetweenbrightsunandshowers.Inre
Inrecentyears,railroadshavebeencombiningwitheachother,mergingintosupersystems,causingheightenedconcernsaboutmo
Withtherapidglobalizationofscienceitself(morethan40percentofscientificPh.D.studentstrainedintheUnitedStates
Whenamagazineforhigh-schoolstudentsaskeditsreaderswhatlifewouldbelikeintwentyyears,theysaid:machineswouldbe
Scholarsandstudentshavealwaysbeengreattravellers.Theofficialcasefor"academicmobility"isnowoftenstatedinimpres
Scholarsandstudentshavealwaysbeengreattravellers.Theofficialcasefor"academicmobility"isnowoftenstatedinimpres
Forallhisvauntedtalents,FederalReserveChairmanAlanGreenspanhasneverhadmuchofareputationasaneconomicforecaste
Forallhisvauntedtalents,FederalReserveChairmanAlanGreenspanhasneverhadmuchofareputationasaneconomicforecaste
Whenweworryaboutwhomightbespyingonourprivatelives,weusuallythinkabouttheFederalagents.Buttheprivatesector
随机试题
论述建设社会主义文化强国。
Theshopownercameuptosee______.
下列属于可逆性印模材料的是
调理气机时应注意顺应
最常见的人类炭疽病是
患者,男,56岁。染发后3天,头、面部突然出现红斑,肿胀,水疱,糜烂渗出,眼脸水肿明显,自觉灼热,瘙痒。伴怕冷,发热,头痛,苔黄腻,脉滑数。治疗宜首选()
《中华人民共和国刑法》第一百三十四条规定,企业、事业单位职工由于不服从管理,违反规章制度,或者强令工人声违章冒险作业,因而发生重大伤亡事故或者造成其他严重后果的,处________以下有期徒刑或拘役;情节特别恶劣的,处3年以上7年以下有期徒刑。
通常,期限在1年以上的国债为贴现式国债。()
书院在教学方面的最大特点是朱熹创立的(),即学术辩论制度。
通常打印质量最好的打印机是()。
最新回复
(
0
)