学年人教版选修七unit 3 under the sea using language课时作业.docx
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学年人教版选修七unit 3 under the sea using language课时作业.docx
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学年人教版选修七unit3undertheseausinglanguage课时作业
usinglanguage课时作业
I.完形填空
阅读下面短文,掌握其大意,然后从各小题所给的四个选项(A、B、C和D)中,选出最佳选项。
Amarinebiologistplacedasharkintoalargeholdingtankandthenreleasedseveralsmallbaitfishintothetank.Theresultmetyour1,thesharkquicklyswamacrossthetank,attackedandatethesmallerfish.
Thebiologistthen2astrongpieceoffiberglassintothetank,creatingtwo3parts.Shethenputthesharkononesideofthe4fiberglassandanewsetofbaitfishontheother.5,thesharkquicklyattacked.Butthistime,theshark6becauseitknockedhardagainstthefiberglass7.Determined,thesharkkept8thisbehavioreveryfewminutes,but9.Meanwhile,thebaitfishswamaround10inthesecondpart.Eventually,theshark11hopeofhunting.Thisexperimentwascarriedoutseveraltimes.Eachtime,thesharkgotless12andmadefewerattemptstoattackthefish,untilit13hittingthefiberglassandsimplystoppedattacking.Thebiologistthen14thefiberglass,butthesharkdidn’tattack.Thesharkwastrainedtobelievea15existedbetweenitandthebaitfish,16thebaitfishcouldswimwherevertheywished,freefromharm.
Manyofus,afterexperiencingsetbacksandfailures,17giveupandstoptrying.Likethesharkinthestory,webelievethat18wewereunsuccessfulinthepast,wewillalwaysbeunsuccessful.19,evenwhenno"real"obstacleexistsbetweenwhereweareandwherewewanttogo,we20seeobstaclesinourheads.
1.A.demandsB.expectationsC.schedulesD.requirements
2.A.changedB.addedC.insertedD.crashed
3.A.separateB.oppositeC.connectedD.relevant
4.A.delicateB.hiddenC.transparentD.flexible
5.A.YetB.MeanwhileC.InsteadD.Again
6.A.bouncedB.pausedC.withdrewD.leapt
7.A.trapperB.catcherC.testerD.divider
8.A.accomplishingB.repeatingC.copyingD.strengthening
9.A.inorderB.invainC.insecretD.inpain
10.A.unaccustomedB.unchallengedC.unharmedD.unnoticed
11.A.divorcedB.declinedC.raisedD.abandoned
12.A.blindB.aggressiveC.alertD.arbitrary
13.A.gotoccupiedwithB.gotinvolvedin
C.gottiredofD.gotusedto
14.A.readjustedB.restoredC.replacedD.removed
15.A.barrierB.distanceC.gapD.distinction
16.A.soB.butC.asD.for
17.A.readilyB.intentionallyC.emotionallyD.physically
18.A.becauseB.thoughC.unlessD.while
19.A.AboveallB.InotherwordsC.AsaresultD.Inconclusion
20.A.abruptlyB.constantlyC.eventuallyD.occasionally
II.阅读理解
A
Untilrecently,scientistshadmappedonlyabout20percentoftheseafloor.Butourknowledgeofthedeepseasischangingbecauseofinformationfromsatellites.Scientistshaveproducedanewmapthatprovidesadetailedpictureoftheoceans.Themapisexpectedtohelpoceanographers(海洋学家),industryandgovernments.
Thenewmapistwiceasdetailedasthemapmade20yearsago.DavidSandwellisageophysicsprofessorattheUniversityofCalifornia.Heandotherscientistsworkedonthemappingproject.Hesaystheyturnedtospacetolookdeeperintotheocean.
Thescientistscollectedandstudiedinformationfromtwosatellites.SomeofthedatacamefromtheEuropeanSpaceAgency’sCryo-2satellite.ItwasplacedinEarth'sorbittowatchseaice.TheothersatelliteistheAmericanspaceagency'sJason-1.Itisstudyingthesurfaceoftheoceans.Scientistscombinedthesatellitedatawithimagesgatheredbysonar(声波定位仪)equipmentonships.Sonarworksbysendingsoundwavesthroughthewater.Whenthesoundwaveshitanobject,itspresenceisconfirmed.
Thenewmapshowstheseafloorasithasneverbeenseenbefore.Itshowsthousandsofunderwatermountainsandplaceswherecontinentspulledapart.Itshowswhereearthquakeswereactivemanyyearsago.Theyallareburieddeepunderneaththeoceanfloor.
DavidSandwellsaysthemapisapowerfultoolforfisheries,thoseinterestedinprotectingtheenvironmentandforoilexploration.
“Thepetrolexplorationindustryisinterestedinhowtoreconnectthecontinents,bringthembacktogethertectonicallysoyoucanmapthebasinsononecontinentaledge—say,Africa—andusethattoestablishwherethesimilarbasinwouldbeontheothercontinentaledgeinSouthAmerica.”
Ifscientistsknowthatinformation,theymaybeabletofindoilfields.Thenewdataalsowillhelpscientistsimprovetheirestimatesofoceandepths.Thisinformationcanhelpshipstravelsafelyandimprovemilitaryoperationsandscientificprojectsworldwide.
Mr.Sandwellthinksscientistswillmakemanymorediscoveriesastheyexaminethenewmapandtheinformationit
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