【文档说明】清华版英语五年级下册《UNIT 3 THE ENVIRONMENT AND US LESSON 17》PPT课件2(共18页).ppt，共(18)页，3.981 MB，由小喜鸽上传

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UNIT3THEENVIRONMENTANDUSLESSON17WaterThereissaltwaterandfreshwaterontheEarth.Saltwateriswaterfromseasorocean

s.Freshwateriswaterfromriversandlakes.Wecanonlyusefreshwater,butthereisnotmuchfreshwaterontheEarth.Waterisimportant.People,animalsandplantsneedwate

rtogrow.Sadly,peoplewastealotofwater.Theywastewaterwhentheykeepwaterrunning.Theywastewaterwhentheywaterplants.Peoplemakewaterdirty,too.The

ymakewaterdirtywhentheythrowtrashintoriversandlakes.Whatdoyoulearnfromthisstory?Talkwithyourfriends.记忆大比拼！老师将单词卡片按照随意顺

序摆好，学生记忆，之后老师随意打乱顺序，学生根据记忆将单词还原。Homework1.Rememberthesenewwords.2.Readthedialoguetoyourparents.