【优化方案】高二英语（人教版必修7）Unit3SectionⅢ课时作业

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1、I•阅读理解Jellyfishhavedriftedalongonoceancurrentsformillionsofyears，evenbeforedinosaurslivedontheearth.Theyarecommonincoldandwarmoceanwater,indeepwater,andalongcoastlines.Jellyfishhavetinycelsintheirtentacles（触手）toparalyze（麻痹）theirpreybeforetheyeatthem.Therearemanyty

2、pesofjellyfishintheocean.Thesejellylikecreaturesmovealongonoceancurrents.Insidetheirbellshapedbodyisanopeningandthatistheirmouth.Theyeatandletoffwastefromthisopening.Asjellyfishsqui『t（l喷岀）waterfromtheirmouththeyaremovingforward.Tentacleshangdownfromthesmoothbag-li

3、kebodyandsting（£）theirprey・Jellyfishstingscanbepainfultohumansandsometimesverydangerous.Butjellyfishdon'tpurposelyattackhumans.Moststingsoccurwhenpeopleaccidentallytouchajellyfish,butifthestingisfromadangerousspecies,itcanbedeadly.TheAustralianbox-likeseawaspisthe

4、mostpoisonoustohumans・TheliorfsmanejellyfishfoundintheNorthAtlantichasabellwhichcanreachtwometersindiameterwithtentaclesaslongas33meters.Thepoisonousanimalisfoundfloatingonthesurfaceoftropicaloceanwateranditsstingissaidtobeasdangerousasacobra'sbite.Jellyfishdigest

5、theirfoodveryquickly.Theywouldn'tbeabletofloatiftheyhadtocarryalarge,undigestedmealaroundforalongperiod.Theydineonfish,shrimpscrabs,tinyplants,etc.andwilleveneatotherspeciesofjellyfish.Seaturtlesenjoythetasteofjellyfish.Somejellyfishareclearandcanlooklikeaplasticb

6、aginthewate匚Othersareinbrilliantcolorssuchaspink,yellow,blue,andpurple,andoftenaregivingofflights.Chinesehavefishedforjellyfishfor1,700years.TheyareconsideredadeliciousdishandareusedinChinesemedicine.【解题导语】水母种类繁多，分布于全球各地的水域里，本文主要对水母进行了介绍。1・Whatwouldbethebesttitlef

7、orthepassage?A.TheEvolutionofJellyfishB.TheOldestCreature:JellyfishC.ADangerousCreature:JellyfishD.FactsaboutJellyfish解析：选D。主旨大意题。本篇文章主要介绍了水母的各种特点和习性，故答案为D。解析：选B。推理判断题。从第二段的Asjellyfishsquirt（喷出）waterfromtheirmouththeyaremovingforward.可知水母靠嘴喷水的力量在海里游动。3.Aftereating

8、abigmeal,ajellyfishwill•A.catchanotheroneinashorttimeB•giveoffcolorfullightstodigestC.trytodigestitassoonaspossibleD.floatonthesurfaceoftheseatodigest解析