2022年土壤的保护教学设计t .pdf

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1、学习好资料欢迎下载土壤的保护教学设计会泽县古城街道中心学校曾丽一、教材分析：土壤的保护这一课是小学义务教育课程标准试验教科书科学三年级下册第4 课的内容，是在学生学习了 肥沃的土壤后，对土壤有了初步了解的基础上，引导学生探究水土流失的原因，了解土壤保护的措施，通过模拟实验引导学生认识自然界水土流失的现象，并分析造成水土流失原因，使学生知道保护土壤的重要性，同时对学生进行环境保护教育。二、学情分析：作为农村的孩子对于土壤比较熟悉，对于土壤的重要性以及对土壤的破坏现象都有一定的经验。因此，学习起来轻松，而且感兴趣。三、教学内容：苏教版科学三年级下册第一单元第4 课内容及相应练习。四、教学目标：1.

2、知道土壤为人类所作的贡献。学习好资料欢迎下载2.会做水土流失的对比试验。3.知道人类的破坏土壤的行为有哪些。4.意识到保护土壤及环境的重要性，愿意为保护土壤出一份力。五、教学重点难点：重点：知道人类应该怎样保护土壤。难点：掌握好水土流失对比实验中的条件。六、教学准备：多媒体课件，水土流失实验用具：土壤、2 个浅盒子、由教师事先种好的草皮，水、自制喷壶或烧杯、砖块、1 个大的托盘。五、课时安排：1 课时六、教学过程：(一)谈话导入请同学们看老师手里这盆花，漂亮吗？如果我把花从土壤里拔出，请问：花还会存活吗？师：对，不能，植物生长离不开土壤，同样动物和人类的生存也离不开土壤，那我们就应该保护土壤，

3、这节课我们就一起来探讨有关土壤保护的话题。（板书课题）（二）自主学习，合作探究1.了解土壤为人们做了什么？学生根据收集的资料及已有经验进行探讨：文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7

4、HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R

5、9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7

6、ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S

7、10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4

8、文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:C

9、C6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4学习好资料欢迎下载土壤里

10、生长的哪些直接提供给我们人类？土壤里的哪些被动物们利用了？我们生活中的哪些产品来自土壤？你还知道哪些动植物及人类离不开土壤的事例？小组讨论：学生拿出自己准备的资料，选择喜欢的问题分小组讨论。交流并汇报结果多媒体显示插图，介绍窑洞和鼹鼠。小结：土壤为植物提供了养料、水分，为动物提供了生存的栖息地，也为人类提供了住所和制作物品的原料，土壤是人类和动植物共同的家园，也正是有了土壤，才有了这美丽可爱的世界。2.活动一：了解一些土壤荒漠化的原因。学生看图片，思考：为什么有的地方草丰林茂，而有的地方却寸草难生呢？学生发表各种意见或猜测。教师活动：补充土地荒漠化的资料：3.活动二：实验：了解植被对土壤蓄水能

11、力的作用。提出问题：想一想，当森林被砍伐、植被遭破坏后，土壤的蓄水能力会发生什么样的变化？猜想假设：森林被砍伐、植被遭破坏后，土壤的蓄水能力（没文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7

12、HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R

13、9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7

14、ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S

15、10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4

16、文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:C

17、C6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4学习好资料欢迎下载有变化

18、/变小/变大）制定方案：小组实验方案与器具材料准备：泥土、草皮、水壶。温馨提示：注意实验的公平性，土堆的大小、水流的大小、水量的多少都要一样，不同的是一个有草皮，一个没有草皮。实验过程中要注意观察水流冲过以后，土层的变化和流水经过的痕迹。（1）小组实验过程。（2）小组实验记录。证实猜想，明辨是非，小组得出实验结论；师小结。4.活动三：认识到没有土壤的后果。提出问题：假如没有了土壤，地球上将是怎样的情景？小组讨论：认真思考，大胆想象，分小组讨论。展示交流：学生分小组交流、教师引导。5.活动四：了解人类对的哪些活动破坏了土壤。学生自己看多煤机课件的四幅插图，提出问题。（1）这些活动会破坏土壤么？应

19、该怎么做才对？（2）你认为还有人类的哪些活动破坏了土壤？学生看图，认真思考。展示交流：学生分小组交流、教师引导学生补充完善。文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V

20、7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z

21、4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8

22、H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码

23、:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3

24、M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z

25、7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4学习好资料欢迎下载教师活动：除了同学们展示的

26、其他例子，老师也搜集了许多破坏土壤的例子及造成的危害，同学们来看：学生活动：学生观看、学习，提高对保护土壤重要性的认识。拓展补充：保护土壤无小事一节 1 号电池烂在地里能使1 平方米的土壤永久失去利用价值。塑料垃圾被埋在土壤中，降低了土壤的透气性，同时也阻碍了植物根系的发育和对水分、养分的吸收与利用。6.讨论我们可以为保护家乡的土壤做些什么？提出问题：你认为我们能为保护土壤做什么？学生活动：学生分小组讨论、交流学生汇报小结：我们小学生能做的就是植树造林；垃圾分类回收；搞好环保宣传工作等。（三）巩固应用通过朗诵诗歌总结课文，引导他们说说本节课有什么收获？（四）课后作业回家自己种一棵树，让孩子和小

27、树一起成长。（五）板书设计文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4

28、S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H

29、4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:

30、CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M

31、10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7

32、 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9

33、R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4学习好资料欢迎下载4 土壤的保护环保宣传植树造林垃圾回收及分类文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8

34、H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码

35、:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3

36、M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z

37、7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I

38、9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V

39、7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4文档编码:CC6S3M10T3Z7 HS5I9R9Z1V7 ZF4Z4S10S8H4