新概念第四册第39课课文详解,新概念第四册第14课练习题及答案

新概念英语第4册课后习题答案:
　　Unit 14 DBDCC ACCBD BD
　　新概念英语第4册课后习题:
　　Multiple choice questions 多项选择题
　　Choose the correct answers to the following questions.
　　Comprehension 理解
　　1 The reason it's hard to forecast the weather is that ______.
　　a.conditions rapidly deteriorate
　　b.there is always turbulence
　　c.only satellites have a panoramic view of conditions
　　d.the effect of tiny changes cannot be detected or calculated
　　2 Even with grid points which are sixty miles apart, forecasters _____.
　　a.have to depend on satellites for information
　　b.have to make assumptions about some of the data
　　c.work on modern weather models
　　d.prevent errors from multiplying
　　3 Which of these statements is true?
　　a.The only way to solve the problem is to have sensors spaced at one-foot intervals.
　　b.The only way to solve the problem is to have infinitely powerful computers.
　　c.The only way to solve the problem is to have perfectly accurate readings.
　　d.At present, there is no way of making absolutely accurate predictions.
　　4 Tiny variations in temperature, pressure and humidity _____.
　　a.will be picked up by sensors at one-minute intervals
　　b.are used to predict the weather one month ahead
　　c.can lead to completely unexpected weather conditions
　　d.produce expected results
　　Structure 句型
　　5 Generally speaking, any prediction ______ rapidly.(1.2)
　　a.is deteriorating
　　b.has deteriorated
　　c.will deteriorate
　　d.had deteriorated
　　6 Only satellites _______ see continent-size features.(11.5-6)
　　a.are able to
　　b.could
　　c.are possible
　　d.are capable
　　7 _____ the earth could be covered with sensors.(11.9-10)
　　a.Providing that
　　b.On condition that
　　c.Say
　　d.Allowing that
　　8 The computer will be incapable ______ whether Princeton will have sun or rain one month away.(11.13)
　　a.predict
　　b.to predict
　　c.of predicting
　　d.predicting
　　Vocabulary 词汇
　　9 The world's best weather forecasts are based on _______.(1.1)
　　a.certain knowledge
　　b.guess work
　　c.scientific facts
　　d.accurate calculation
　　10 The modern weather models work with a _____ of points.(1.7)
　　a.scale
　　b.balance
　　c.line
　　d.network
　　11 ‘Humidity’ refers to ______.(1.11)
　　a.light
　　b.water vapour
　　c.pressure
　　d.heat
　　12 An infinitely powerful computer takes in all the data and _____ what will happen.(11.11-12)
　　a.predicts
　　b.foretells
　　c.estimates
　　d.works out

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