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, such as torrential rains and severe thunderstorms, begin quickl
Many of the most damaging and life threatening types of weather, such as torrential rains and severe thunderstorms, begin quickl
admin
2014-07-25
36
问题
Many of the most damaging and life threatening types of weather, such as torrential rains and severe thunderstorms, begin quickly, strike suddenly, and disappear rapidly, destroying small regions while leaving neighboring areas untouched. Conventional(传统的)computer models of the atmosphere have limited value in predicting short-lived local storms because the available weather data are generally not detailed enough to allow computers to see clearly the small atmospheric changes that come before these storms. In most nations, for example, weather-balloon observations are taken just once every twelve hours at location 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 "nowcasts" , was impracticable. The cost of equipping 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 beyond overcoming. Fortunately, scientific and technological advance have overcome most of these problems. Radar systems, automated weather instruments, and satellites are all capable of making detailed, nearly continuous observations over large regions at a relatively low cost. Communication satellites can transmit data around the world cheaply and immediately, and modern computers can quickly compile and analyze this large volume of weather information. Meteorologists(气象学家)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.
Nowcasts used to be impracticable because______.
选项
A、there were no conventional computers
B、the cost of the equipping and operating was sky-high
C、there were no difficulties in data processing
D、there were not enough meteorologists
答案
B
解析
询问细节题。B项与定位句,即“The cost of equipping and operating many thousands of conventional weather stations was extremely high”对应。故B为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/2qaYFFFM
0
成人本科学位英语
相关试题推荐
Intermsofbodilydistance,NorthAmericans______.ManypeoplefromMoslemcountries______.
Shebecame(angrier)astheyearswent(on)becauseshesaw(that)theyweredoingto(other)youngsters.
Throughoutthecolonialperiodtherewasaremarkableshortageofwomen,whichvariedwiththeregionsandwasalwaysgreatesti
Dr.Cleimandidnotexplaininthepassage______.Whichofthefollowingstatementsiswrong?
Theweatherisnotascold(asyouthink).So(Idon’tthink)theiceisthick(enough)to(walkonit).
Theweather______usfromclimbingthemountain.
(Becauseof)theseveresnowstormand(the)roadblocks,theairforce(droppedfood)andmedicalsupplies(closethecity).
Ourcountryhasmanychancesforadultswhowanttomaketheirlivesbetter.Therearepublicschoolsyoucanattend.Inthesch
Thesummerholidayisthebestpartoftheyearformostchildren.(31)Theweatherisusuallygood,sothatonecanspendmost
随机试题
按辩证法的全面性要求办事,对我们有哪些要求?
患儿,8岁,男。4周前曾患脓疱疮,3日来眼睑浮肿。尿少,有肉眼血尿,咽部不充血,心脏无异常,未触及肝脾,血压20/14.7kPa(150/110mmHg)。尿:蛋白(+),有大量红细胞,少数白细胞。血常规:红细胞及血红蛋白轻度下降,抗链球菌溶血素“O”50
下列哪一项属于牙周疾病一级预防措施
对不适合做水压试验的容器,如容器内不允许有微量残留液体,或由于结构原因不能充满水的容器,可用()代替水压试验。
私募股权投资的盈利过程中,基金将充分利用自身战略、管理、财务等优势,优化企业管理,最大限度地提升企业价值。这属于()。
个人汽车贷款中对经审批同意的贷款,应及时通知借款申请人以及其他相关人(包括抵押人和出质人等),确认签约的时间,签署()和相关担保合同。
下列不属于零售企业物流的是()。
张某和王某是邻居,在一起行政案件的执行中,人民法院执行人员误将案外人员王某的一间房屋当作被执行人张某的房屋强行拆毁。王某提出赔偿请求,该损失应由谁赔偿?()
A、 B、 C、 C句子是询问艾伯特先生为什么雇用新秘书的Why疑问句。
A、Shegenerallydoesn’tallowpeopletoborrowit.B、Sheistryingtosellit.C、Sheboughtitfromafriend.D、Ithasbrokendo
最新回复
(
0
)