中石华东《科技英语》2013年春学期在线作业(四)

《中石华东《科技英语》2013年春学期在线作业(四)》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、中石华东《科技英语》2013年春学期在线作业(四)《科技英语》2013年春学期在线作业（四）一、单选题1.Itwasin2005_____webegantointroducethisnewtechniqueintoourcompany.A.whichB.thenC.whenD.that正确答案：D2.Scientistshavediscoveredgeneticvariationsthatmakepeoplemorelikelytoget______oncigarettesandmorepronetodeveloplungcancer.A.retainedB.hook

2、edC.tiredD.hanged正确答案：B3.Everycountrytriestomaintaina(n)______balanceoftrade,whichassuresitofthemeanstobuynecessaryimports.A.organicB.favoriteC.compoundD.favorable正确答案：D4.Themethodsusedtoachievetheseaimswillbedescribedlater,and______canbeseenbroadlyasafocusingontoatarget.A.uptonowB.sofa

3、rC.asyetD.forthepresent正确答案：D5.____twice,thepostmanrefusedtodeliverourlettersunlesswechainedourdog.A.BeingbittenB.BittenC.HavingbittenD.Tobebitten正确答案：B6.Wemustputthe______sideofthepolicyintoconsiderationtoavoidpossiblemistakes.A.converseB.reverseC.reserveD.revise正确答案：B7.WhenBobandhisfr

4、iendscame,we____oursupperthen.A.hadB.werehavingC.haveD.arehaving正确答案：B8.Overthepastdecades,seaiceintheArctic（北极）______asaresultofglobalwarming.A.haddecreasedB.willdecreaseC.hasbeendecreasingD.isdecreasing正确答案：C9.Heleftordersthatnothing______untilthepolicearrived.A.wastouchedB.hadbeentou

5、chedC.shouldbetouchedD.wastobetouched正确答案：C10.Myuncle'shouseinthedowntownareaismuchsmallerthanours,butitistwice______expensive.A.asB.soC.tooD.very正确答案：A11.Therearetworoomsinthehouse,____servesasakitchen.A.thesmallerofwhichB.thesmallerofthatC.thesmallestofwhichD.thesmallestofthat正确答案：A12

6、.Hearingthejoke,allthestudentsburstinto______laughter.A.visualB.long-standingC.spontaneousD.contributing正确答案：C13.Forthetimebeing,Philipscouldnotsaywhensuchaproductasthismightbe______available,however.A.verticallyB.commerciallyC.horizontallyD.rapidly正确答案：B14.Theyaretryingto______thewaste

7、dischargedbythefactoryforprofit.A.exposeB.exhaustC.exhibitD.exploit正确答案：D15.BythetimehearrivesinBeijing,we________herefortwodays.A.willstayB.havebeenstayingC.willhavestayedD.havestayed正确答案：C16.Thankheavens!Youhavecomebackhome.Youshouldbethankfulthatyouhaveescapedwithonly______i