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--begin qu
Many of the most damaging and life-threatening types of weather--torrential rains, severe thunderstorms, and tornadoes--begin qu
admin
2010-01-07
46
问题
Many of the most damaging and life-threatening types of weather--torrential rains, severe thunderstorms, and tornadoes--begin quickly, strike suddenly, and dissipate rapidly, devastating small regions while leaving neighboring areas untouched. One such event, a tornado, struck the northeastern 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 discern the subtle atmospheric changes that precede 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 larger regions than they do forecasting specific local events.
Until recently, the observation--intensive approach needed for accurate, very short-range forecasts, or "Nowcasts", was not feasible. The cost of equipping and operating many thousands of conventional weather stations was prohibitively high, and the difficulties involved in rapidly collecting and processing the raw weather data from such a network were insurmountable. 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 modern computers can quickly compile and analyzing this large volume of weather information. Meteorologists 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, Nowcasting is becoming a reality.
Which of the following would best illustrate Nowcasting?
从前几题和文章最后一句可以推断出此答案。
选项
A、A five-day forecast.
B、A warning about a severe thunderstorm on the radio.
C、The average rainfall for each month.
D、A list of temperatures in major cities.
答案
解析
B
转载请注明原文地址:https://jikaoti.com/ti/0QBsFFFM
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
Therearetwobasicwaystoseegrowth:oneasaproduct,theotherasaprocess.Peoplehavegenerallyviewedpersonalgrowtha
BetweentheendoftheWorldWarIIandtheearlysixties,ababyboomoccurredintheUS,andpeoplebornduringthatperiodwe
WhydoestheWesternmovieespeciallyhavesuchaholdonourimagination?Chiefly,Ithink,becauseitoffersseriousinsights
WhydoestheWesternmovieespeciallyhavesuchaholdonourimagination?Chiefly,Ithink,becauseitoffersseriousinsights
Inrecentyears,therehasbeenanincreasingawarenessoftheinadequaciesofthejudicialsystemintheUnitedStates.Costsa
Ontheheelsofitsrecentdecisiontocriminalizeconsumerswhoripsongsfromalbumstheyhavepurchasedtotheircomputers(or
Itwasamomentmostbusinessexecutiveswouldpausetosavor:latelastyear,GermansportinggoodspioneerAdidaslearnedthat
Theaveragepersonseestensofthousandsofimagesaday—imagesontelevision,innewspapersandmagazines,andonthesidesof
随机试题
加快形成新的经济发展方式,就要把推动发展的立足点转变到()。
诗句“忽如一夜春风来,千树万树梨花开”所采用的修辞手法是()
呼吸性酸中毒(respiratoryacidosis)
牙防指导组派出一专家小组到某氟牙症流行地区调查流行状况及其影响因素。根据研究计划,他们进行了以下工作。使用含氟牙膏的同时要
患者女,53岁,右眼流泪伴分泌物增多2周。查体:右眼视力正常,泪囊区皮肤红肿,隆起,明显压痛,按压泪囊区,可见大量脓性分泌物自泪小点排出,鼻侧结膜充血。若处理不当,该病可危及生命,因其可演变成
下列哪项症状是思维内容障碍的表现
小儿4个月,人工喂养。平时易惊,多汗,睡眠少,近2日来咳嗽、低热,今晨突然双眼凝视,手足抽动。查体:枕后有乒乓球感。患儿最可能是
治疗脑水肿的首选药是
工程项目的质量目标和水平是通过设计使其具体化,设计质量的优劣,直接影响工程项目的功能、使用价值和投资的经济效益,所以设计项目首先应( )。
下列房屋及建筑物中,属于房产税征税范围的是()。(2014年)
最新回复
(
0
)