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1、leadershipintentionandmeaningintothetext.Althoughhiseyesnowwriteonlyarelativelysmallnumberofmaterials,butalsoquitedifficult,eventoamoldingmaterialherselfseemsnotverysatisfiedwiththequalityofserviceneedstobeenhanced.Threeisalotofworktoimplementpassive,activeandadvanced.Mostcontractorsdomattersassi
2、gnedbytheleadership,workisoftenintheorders,toimplementthetask,donotwanttolead,notwanttothinkahead,planahead,andtoseektheleadership;seekdeepintotheresearch,provideinformationgoodstaffseek.Especiallyinthewritingprocessofmaterial,itencounteredmuch,timetight,heavy分式方程的应用betweentherequirements.Andinth
3、eencounterthetediouswork,complexthings,sometimestakethemethodofescape,thatbridgetheboattothebridgestraight",nottheirownforcepleasefindcountermeasures,buttowaitfortheself,thelackofaspiritofhardresearch.Two,thecauseoftheproblemThroughtheanalysis,Ifeelthattherearemanyreasonsfortheseproblems.Oneideai
4、sobsolete.Thefailuretodosystemresearchontheessenceofreadingtheoriginal,palmandmasterthetheoryofqualityreadwithoutthoroughunderstanding,hasnotbeeneffectively1leadershipintentionandmeaningintothetext.Althoughhiseyesnowwriteonlyarelativelysmallnumberofmaterials,butalsoquitedifficult,eventoamoldingma
5、terialherselfseemsnotverysatisfiedwiththequalityofserviceneedstobeenhanced.Threeisalotofworktoimplementpassive,activeandadvanced.Mostcontractorsdomattersassignedbytheleadership,workisoftenintheorders,toimplementthetask,donotwanttolead,notwanttothinkahead,planahead,andtoseektheleadership;seekdeepi
6、ntotheresearch,provideinformationgoodstaffseek.Especiallyinthewritingprocessofmaterial,itencounteredmuch,timetight,heavy1．掌握列分式方程解应用题的方法和步骤，提高学生分析问题和解决问题的能力；(重点)2．用分式方程来解决现实情境中的问题，通过分式方程的应用教学，培养学生数学应用意识．(难点) 一、情境导入1．引导学生回顾列方程解应用题的一般步骤．学生积极思考，并交流、讨论总结出：第一步，审清题意；第二步，根据题意设未知数；第三步，列式子并找
7、出等量关系，建立方程；第四步，列方程，并解出答案；第五步，检查方程的解是否符合题意；最后作答．2．提问：分式方程的应用题应该怎么解呢？二、合作探究探究点：列分式方程解决实际问题【类型一】工程问题抗洪抢险时，需要在一定时间内筑起拦洪大坝，甲队单独做正好按期完成，而乙队由于人少，单独做则超期3个小时才能完成．现甲、乙两队合作2个小时后，甲队又有新任务，余下的由乙队单独做，刚好按期完成．求甲、乙两队单独完成全部工程各需多少小时？解析：设甲
