高中英语课时分层作业2unit7thesea北师大版必修3

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1、课时分层作业（二）［语言知识练习固基础］I.单句语法填空1.Theroomis15feetinlength(long)and10feetinbreadth・2.Withmanythingstodeal(deal)with,1havetoworkdayandnight・3.Hewasbannedfromdriving(drive)forsixmonths.4•Givingadviceattherighttimehastoinvolveagreatdealofintel1igence(intel1igent).5・Themoreheworked,themoreene

2、rgetic(energy)hebecame.6.Ittookmeanhourtofindthesolutiontotheproblem.7.Hisnicceisattractive(attract)andmatureforherage・8.Youcanalwaysmakealivingwithaskill.9.Iadvisedthemtowatchoutforslickspotsonthesidewalk.10.Theinformationyougatheredisofgreathelptome.II•完成句子1.我们必须采収措施制止污染。Wemusttake

3、measurestostoppollutionhere・2.由男孩领路，我们很容易找到冋家的路。Withtheboyleadingtheway,wefoundthewaybackhomeeasily.3.你工作越努力，你就会取得更大的进步。Theharderyouwork,thegreaterprogressyouwillmake.4.当心一个带着黑帽子的高个男人。Watchoutforatallmanwithablackhat.5.奥运会每四年举行一次。TheOlympicsareheldeveryfourycars/everyfourthyoar.［高考题型

4、练习提能力］I.阅读理解FarfromthelandofAntarctica(南极洲)，ahugeshelfoficemeetstheocean.Attheundersideoftheshelfthere1ivesasmal1fish,theAntarcticcod.Forfortyyearsscientistshavebeencuriousaboutthatfish.Howdoesitlivewheremostfishwouldfreezetodeath?Itmusthavesomesecret.TheAntarcticisnotacomfortablepla

5、cetoworkandresearchhasbeenslow.Nowitseemswehaveananswer-Researchwasbegunbycuttingholesintheiceandcatchingthefish・Scientistsstudiedthefish'sbloodandmeasureditsfreezingpoint.Thefishweretakenfromseawaterthathadatemperatureof—1・88°Candmanytinypiecesoficefloatinginit.Thebloodofthefishdidn

6、otbegintofreezeuntilitstemperaturewasloweredto—2・05°C.Thatsmalldifferenceisenoughforthefishtoliveatthefreezingtemperatureoftheice-saltmixture.Thescientists'nextresearchjobwasclear：Findoutwhatinthefish，sbloodkeptitfromfreezing.Theirsearchledtosomereallystrangethingmadeupofaprotein（蛋白质

7、）neverbeforeseeninthebloodofafish.Wheni_twasremoved,thebloodfrozeatseawatertemperature.Whenitwasputback,thebloodagainhaditsantifreezequalityandaloweredfreezingpoint.Studyshowedthatitisanunusualkindofprotein.Ithasmanysmallsugarmolecules（分子）heldinspecialpositionswithineachbigproteinmol

8、ecule.Becaus