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ID:19609014
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页数:13页
时间:2018-10-04
《高中英语 unit 3 under the sea单元综合测试 新人教版选修71》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、Unit3Underthesea答题栏12345678910111213141516171819202122232425262728293031323334353637383940Ⅰ.阅读理解AAbout97%oftheworld'swaterissaltyandisfoundinouroceansandseas.But,aswecan'tdrinkseawater,howcanitbeimportant?Everypartofourseasandoceanscontainsanamazingnumberofanimalsan
2、dfishthatliveatdifferentoceandepths.Mostofthedifferentspeciesofanimalsandfishdependonsimpleplantsfortheirfood.Thesesimpleplantscalledalgae(海藻)driftnearthesurfaceoftheoceanandusesunlighttoturncarbondioxideandwaterintofoodandoxygen.Infact,algaeproduceoverhalfoftheoxyg
3、enpeoplebreathe.Howimportantseawateris!Eachplantoranimalinourseasandoceansisanimportantlinkinafoodchain.Thealgaeareeateninlargeamountsbymicroscopicanimals,whichareinturnconsumedbylargeranimals.Thesefoodchainsaredelicatelybalanced.Thebadnewsaboutthefoodchainsintheoce
4、ansisthattheyareunderthreatbecauseofman.Peopleoncethoughtthattheoceansweresobigthatitdidn'tmatterifwedumpedrubbishintothemorcaughthugequantitiesoffishandwhalesforfood.Butwenowknowthisisnottrue,andfishstocksintheoceanshavestartedtodrop.Thankfully,theworldistakingstep
5、stoprotectthefutureofouroceansbyintroducinginternationalagreementstoprotectmarinehabitats.Mostcountrieshaveintroducedfishingrestrictionstoprotectfishstocksintheoceans,andnewtechniquesarebeingpioneeredtocopewithpollution.Finally,theimportanceofprotectingoceansisbeing
6、madeknowntomorepeople.Thisisjustthebeginningofalongprocesstoprotecttheoceansforourfuture.Wedependontheoceansforfishwhichareanimportantpartofthehumandiet.Howimportantseawateris!1.Whichofthefollowingistheproperorderofthefoodchain?A.smallanimals→algae→microscopicanimal
7、s→largeanimals→manB.algae→microscopicanimals→largeanimals→largeranimals→manC.smallanimals→algae→largeanimals→microscopicanimals→manD.microscopicanimals→algae→largeanimals→largeranimals→man-13-2.Fromthepassage,welearnthat________.A.mostfishandseaanimalsliveatthesurfa
8、ceoftheseasB.itisverydifficulttobreakthebalanceofafoodchainC.excessivefishinghascausedthedecreaseinfishstockD.itwon'tbelongbeforetheproble
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