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
Many of the most damaging and life threatening types of weather torrential rains, severe thunderstorms, and tornadoes(龙卷风,)--beg
Many of the most damaging and life threatening types of weather torrential rains, severe thunderstorms, and tornadoes(龙卷风,)--beg
admin
2010-02-17
53
问题
Many of the most damaging and life threatening types of weather torrential rains, severe thunderstorms, and tornadoes(龙卷风,)--begin quickly, strike suddenly, and disappear rapidly, destroying small regions while leaving neighboring areas untouched. Such event as a tornado struck the north eastern section of Edmonton, Alberta, in July 1987. Total damages from the tornado exceeded $ 250 million, the highest ever for any Canadian storm.
Conventional computer models of the atmosphere have limited value in predicting short lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the subtle (微妙的)atmospheric changes that come before these storms. In most nations, for example, weather - balloon observations are taken just once every twelve hours at locations typically separated by hundreds of miles. With such limited data, conventional forecasting models do a much better job predicting general weather conditions over large regions than they do forecasting specific local events.
Until recently, the observation intensive approach needed for accurate, very short - range forecasts, or "Now casts", was not feasible. The cost of e quipping and operating many thousands of conventional weather stations was extremely high, and the difficulties involved in rapidly collecting and processing the raw weather data from such a network were hard to overcome. Fortunately, scientific and technological advances have overcome most of these problems. Radar systems, automated weather instruments, and satellites are all capable of making detailed, nearly continuous observation over large regions at a relatively low cost. Communications satellites can transmit data around the world cheaply and instantaneously, and modem computers can quickly compile and analyze this large volume of weather information. Meteorologists(气象学者) and computer scientists now work together to design computer programs and video equipment capable of transforming raw weather data into words, symbols, and vivid graphic displays that forecasters can interpret easily and quickly. As meteorologists have begun using these new technologies in weather forecasting offices, now casting is becoming a reality.
According to the passage, ______ are the key factor to making "Now casts" a reality.
选项
A、scientific and technological advances such as radar, or satellites
B、computer scientist
C、meteorologists
D、advanced computer programs
答案
A
解析
解决及时预报困难的关键因素是高科技的发展,所以选A。
转载请注明原文地址:https://kaotiyun.com/show/rwnK777K
0
专业英语四级
相关试题推荐
PassageTwo(1)Ifallhadgoneaccordingtoplan,theJamesWebbSpaceTelescope(JWST)wouldbecelebratingits10thanni
PassageThreeWhatculturalinfluencedidOttomanJewsexertonOttomansociety?
Educationgivesustheknowledgeoftheworldaroundus.Itdevelopswithusaperspectiveoflookingatlife.Ithelpsusform
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainingalotofattentionfromthematerialworldthatit
Theroleofteachersineducationextendspastresponsibilityofpassingalonginformation.Asthenamesuggests,theprimaryf
Whetheryou’retheCEOofaFortune500company,orateenageentrepreneurjuststartingout,communicationskillsarevitally
Whatisthemaintopicofthisconversation?
Theprocessofperceivingotherpeopleisrarelytranslated(toourselvesorothers)intocold,objectiveterms."Shewas5feet
Whereisthisnewsreported?
ThelibraryofcongressinWashington,D.C.,which【C1】______thelargestcollectionofbooksintheworld,isfightingabattle
随机试题
以疏风清热、宣肺止咳为功用的方剂是( )。
设备工程管理的核心是()。
用曲线法进行投资偏差分析时,已完工程计划投资曲线和拟完工程计划投资曲线水平距离表示( )。
应在基底进行轻型动力触探的情况不包括()。
混凝土重力坝坝基面上的水压强度集合称为()。
债券的风险来自于()。
针对营业收入实施实质性分析程序,在建立数据的期望值时,可以进行的比较有()。
物业管理企业的组织机构设置要服从(),根据物业管理模式的任务和目标的不同,组织机构设置的重点也应该有所不同。
某村全体村民开会讨论村委会关于征地款的分配方案,村民们因为不赞成此分配方案而愤然起立,村长见状立即宣布:“起立者表示赞成,由于全体赞成,本方案通过!”由此可知( )
MuchhasbeensaidabouttheiPodanditsamazingpopularitywithpeopleofallagesandgroups.TheiPodphenomenonhasalsota
最新回复
(
0
)