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1、Unit2SailingtheoceansUsingLanguageⅠ.单词拼写1．TheRedArmymensufferedmanyhardshipsduringtheLongMarchwithlittletoeatandwithoutwarmclothes.2．Gradually,_thechildrenbegantounderstandmoreandmore.3．Victoryinthelastgamegavethemapsychologicaladvantageovertheiropponents.4．Thistypeofworkrapidlybecomesrou
2、tineandattractsnobody.5．Canfuturereallybeforeseen?Ⅱ.单句改错1．Tom,inadditionhisclassmates,alsojoinsintheactivities.addition后加to2．Dressinginablueskirt,thegirllooksverypretty.Dressing→Dressed3．Agoodnightoutwillhelpyoutakeyourmindsoffexams.minds→mind4．Marytearedthelettertopieceswithoutreadingit.
3、teared→tore5．I'monadilemmaoverwhethertotellhimornot.on→inⅢ.阅读理解AThevastseasurroundingthecontinentshasalwaysinterestedthebravehumanbeing.Fromtheseamancangetfood,minerals,aswellastreasure.Forthousandsofyears,manhasbeensailingonit,buthecouldnotgetfarbeneathitssurface.Manhasbeendreamingofexpl
4、oringdeepintothesea.However,thisisonlyadreamasheisnotafish.Tostaydeepintheseahemustbreatheair,sohecan'tstayunderthewater'ssurfaceforanylengthoftime.Toexploredeepwater,manisconfrontedwithevenmoredangersandproblems.Adiverwhowantstostayunderwaterformorethanafewminutesmustbreatheinandoutairor
5、haveaspecialmixtureofgasesifnaturalairisnotavailable.Asarule,hemaywearadivingsuitandhaveairpumpedtohimfromabovethewater.Heisequippedwithatankofaironhisbackandbreathethroughahose(软管)andamouthpieceattachedtothetank.Itisdangeroustodiveunderwaterbecausewaterweighs800timesasmuchasair.Tonsofwat
6、erpushesagainstadiverwhenhedivesdeepintothesea.Hisbodyisundergreatpressure.Whenadiverisundergreatpressure,hisbloodtakesinsomeofthegaseshebreathes.Asherisestosurface,thewaterpressurebecomesless.Ifthediverrisestooquicklytothewatersurface,thegasesinhisbloodwillnotdisappear,instead,theyformbu
7、bbles.Thediveristhenlikelytobesufferingfromthebends(潜水员病)．Thebendscancauseadivertodoubleupinpain.Ifthediverdoesnottakecertainmeasurestoprotecthimself,theycanevenkillhim.1．Onthewhole,thispassageisabout________.A．specialmixturesofgasesindeepseaB．theproblemsmanfacesind
