新概念英语第四册第1315课练习及答案文档格式.docx

1、b.use the coring bitc.take note of the strata below the surfaced.bring up specimen material from time to time4 If you dont control the oil pressure _.a.oil will be forced to the surface with great forceb.mud will have to be circulated down the drill pipec.you will have to catch the oil at the surfac

2、ed.water will gush to the surfaceStructure 句型5 The holes made for oil go down as _ as 25,000 feet.（1.1）a.manyb.longc.fard.distant6 Nothing has done as _ as to improve deep drilling as the search for oil.（11.3-4）b.muchc.longd.far7 The geologist needs to know _ rocks the drill has reached.（1.8）a.thatb

3、.whenc.howd.which8 _ we get down to the oil, it usually flows with great pressure.（1.10）a.Immediatelyb.The first timec.Untild.As long asVocabulary 词汇9 The holes are only borings, less than a foot _ .（11.2-3）a.roundb.acrossc.throughd.along10 The engine at the top makes the drill pipe go _.（1.6）a.up a

4、nd downb.in and outc.round and roundd.deeper and deeper11 _ a sample is obtained with a coring bit.（11.8-9）a.Every now and againb.In one way or anotherc.Often but not alwaysd.After a long time12 We _ avoid the old, romantic idea of a gusher.（1.12）a.make sure web.cantc.attemptd.try to 课后习题答案:Unit 13

5、ACDAC BDABC AD【篇二】Unit 14课后习题1 The reason its hard to forecast the weather is that _.a.conditions rapidly deteriorateb.there is always turbulencec.only satellites have a panoramic view of conditionsd.the effect of tiny changes cannot be detected or calculated2 Even with grid points which are sixty m

6、iles apart, forecasters _.a.have to depend on satellites for informationb.have to make assumptions about some of the datac.work on modern weather modelsd.prevent errors from multiplying3 Which of these statements is true?a.The only way to solve the problem is to have sensors spaced at one-foot inter

7、vals.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 pic

8、ked up by sensors at one-minute intervalsb.are used to predict the weather one month aheadc.can lead to completely unexpected weather conditionsd.produce expected results5 Generally speaking, any prediction _ rapidly.（1.2）a.is deterioratingb.has deterioratedc.will deteriorated.had deteriorated6 Only

9、 satellites _ see continent-size features.（11.5-6）a.are able tob.couldc.are possibled.are capable7 _ the earth could be covered with sensors.（11.9-10）a.Providing thatb.On condition thatc.Sayd.Allowing that8 The computer will be incapable _ whether Princeton will have sun or rain one month away.（11.1

10、3）a.predictb.to predictc.of predictingd.predicting9 The worlds best weather forecasts are based on _.（1.1）a.certain knowledgeb.guess workc.scientific factsd.accurate calculation10 The modern weather models work with a _ of points.（1.7）a.scaleb.balancec.linework11 Humidity refers to _.（1.11）a.lightb.

11、water vapourc.pressured.heat12 An infinitely powerful computer takes in all the data and _ what will happen.（11.11-12）a.predictsb.foretellsc.estimatesd.works out 课后习题答案:Unit 14 DBDCC ACCBD BD【篇三】Unit 15课后习题1 Fear of industrial espionage _.a.leads to lack of freedom in scientific researchb.especially

12、 applies to scientific research of a general and fundamental naturec.can lead to secrecy in scientific researchd.creates an atmosphere of distrust in business2 Which of these statements is true?a.Some kinds of scientific research are more secret than others.b.All kinds of scientific research are top

13、 secret.c.Firms never tell anyone anything about their scientific research.d.Scientific research workers never speak to each other.3 Firms want to be sure _.a.they limit all those engaged in carrying out scientific researchb.that larger companies cant find out about their scientific researchc.they a

14、re working in an atmosphere of complete secrecyd.they own the rights to intellectual property before they reveal what theyre doing4 The possibility of making discoveries by accident _.a.make it difficult to obtain scientific books from librariesb.encourages competition from other agentsc.increases t

15、he need for secrecyd.means that every discovery has to be patented5 One is the general atmosphere of secrecy _.（11.1-2）a.which it is carried outb.which is carried outc.it is carried outd.it is carried out in6 _ any inquiry is a secret one, it naturallylimits - （1.3）a.With regard tob.As well asc.Supp

16、osing thatd.To the extent that7 Some of the bigger firms are engaged inresearches which are _ general that it is apositive advantage to them not to keep themsecret.（11.6-7）a.suchb.soc.so thatd.in order that8 They _even more processes as secret processes.（11.8-9）a.keepb.keptc.are keptd.are keeping9 T

17、here is the _of freedom of the individual research worker.（1.2）a.lossb.emptinessc.absenced.luck10 It naturally limits all those engaged in _.（1.3）a.performing itb.involving itc.betrothed to itd.allowing it11 It is _not to keep them secret.（11.6-7）a.with their knowledgeb.on their accountc.in their best interestsd.for their benefit12 Sometimes the secrecy goes to such a _that .（1.1.10-11）a.degreeb.processc.limitd.periodUnit 15 CADCD DBACA CA