最新《圆柱的认识》PPT课件(1)教学讲义PPT课件.ppt

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1、《圆柱的认识》PPT课件(1)长方体和正方体都是由（）围成的立体图形。平面（6）（1）（2）（3）（4）（5）√√√圆柱的上、下两个面叫做（），它们是完全（）的两个圆。圆柱两个底面之间的（）叫做高。底面距离相同把圆柱的侧面沿高展开得到一个（）。这个长方形的长等于圆柱的（），宽等于圆柱的（）。圆柱有一个曲面，叫做（）。高侧面长方形底面周长谢谢大家EnvironmentalprotectionRecentlyourclassmateshavehadaheateddiscussionaboutthetopic“EnvironmentorEconomy,MustWeC

2、hoose?”Opinionissharplydividedonthetopic.Somestudentsareinfavorofputtingtheenvironmentinthefirstplace,arguingthatwiththedevelopmentofeconomy,manyplantsandanimalshavediedandfishareevengivennotimetolayeggs.Besides,waterandairareseriouslypolluted,makingpeoplesick.Meanwhile,therearemore

3、andmorepeoplewhoneedmorelandtoliveonandmorefoodtoeat.Othersmaintainthateconomicdevelopmentisatoppriority.Firstofall,peoplearemoreimportantthanplantsandanimals.Actually,manycompaniesandfactoriesareveryconcernedabouttheenvironmentandassumetheirresponsibility.Moreover,withthedevelopmen

4、tofeconomy,morejobswillbecreated.Frommyperspective,firstandforemost,weshouldproducemorethingsfromrecycledmaterials,andlessfromrawmaterials.Plus,weareexpectedtoliveanenvironment-friendlywayoflife.Withthesecombinedefforts,Ibelievethatahealthyenvironmentandstableeconomycangohandinhandi

5、nthenearfuture.