高考英语阅读理解练与析高三英语试卷
日期：2010-07-22 07:45
displayingtheminthelightneededforphotosynthesis，theword"shoot"beingacollectivetermforbothstemandleavesTheleavesarethechieffood-producingprocesscalledphotosynthesisThestemsupportstheleaves，branchshoots，高考英语阅读理解练与析 (A) Thebodyofnearlyallfloweringplantscanbedividedintotwosystems，andsometimesflowersItshouldbeemphasizedthatthewords"stem"and"shoot"arenotsynonymous，andfoodssynthesizedintheleavesareconductedawaythroughthestemtootherregionsoftheplant，andabsorbswaterandvariousdissolvedrawmaterialsfromitThetypicalshootsystemconsistsofamainstemuponwhichareborneleaves，therootsystemwhichgrowsbelowgroundandtheshootsystemwhichgrowsaboveitThetypicalrootsystemfixestheplantfirmlyinthesoil，bothaboveandbelowground，andalsoactsasthemainchannelofcommunicationbetweenthevariousorgansoftheplantWateranddissolvedmineralsabsorbedbytherootsarecarriedinthestemtotheleavesandflowers，wheretheyareeitherusedforgrowthorelsestoredforfutureuseFlowersareorgansthatareconcernedwiththereproductionofthespeciesby，
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