《寂静的春天》教案.pdf

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1、二寂静的春天雷切尔?卡森教学目的：1.知识目标：了解环境污染的原因及其危害；2.能力目标：体会文章中重点句子所表达的思想感情，培养学生整体把握科技文的能力，学习课文把抽象内容说明得具体生动的技巧；3.情感目标：培养绿色信念，倡导环境保护，学习雷切尔?卡森以非凡的个人勇气发出的保护环境的呐喊的精神。教学重点：探讨文章思路,揣摩重点语句，学习课文把抽象内容说明得具体生动的技巧。教学难点：探究理解重点语句和句子所蕴含的感情。教学课时：3 课时教学方法：品读法、探究法教学过程：一.激发情感，导入新课：同学们，我们从生活中体会到：随着社会的进步，时代的发展，科学改变了并且还在继续改变着我们所生存的世界。

2、科学拓展了空间，让人类一步步地从陆地走向海洋，走向太空；科学延伸了时间，让人类延长了寿命，加快了前进的步伐。科学已成为人类文明不可或缺的组成部分，也成为与我们个体生命息息相关的重要因素。通过各种媒体，我们都可以看到、听到、感受到科学世界的丰富和科学智慧的光辉。但是，我们也不得不审视，科学在为人类带来进步的同时，也带来了足可让人类灭亡的危害请同学们观看一段视频，谈谈自己的感受：（视频资料）小结：1989年 3 月 24 日，“埃克森?阿尔迪兹”号在美国阿拉斯加威廉王子岛海岸触礁搁浅，原油泄漏量达1100万加仑，8600 公里海岸线受污染，16 条鲸鱼 30 万只海鸟和 5000 多头海獭、海豹死

3、亡，成为美国历史上最严重的漏油事件。此外,还有许多令人触目惊心的事件发生因此，环境保护已成为我们今天迫在眉睫的话题。今天，我们便来学习一篇引起人们关注环境污染的课文寂静的春天。二、作者作品简介：雷切尔?卡森（19071964），美国生物学家、科普作家。是当代环保运动的先驱。1962 年完成寂静的春天一书。这本书首次揭露了美国农业、商业界为追逐利润而滥用农药的事实，对美国不分青红皂白地滥用杀虫剂而造成生物及人体受害的情况进行了抨击，使人们认识到农药污染的严重性。1964 年因癌症和遭受空前的诋毁、攻击而与世长辞。而人们对她的这本书的评价是：如果没有这本书，环境运动也许会被延误很长时间，或者现在还

4、没有开始。三、基础积累：啮齿（ni）拨弄（nong）滞留（zh）栖居（q）步履（l）文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:C

5、T4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2

6、Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 H

7、P1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3

8、P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3

9、ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9

10、N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1牲畜（ch）四、整体感知：1、快速阅读课文，独立思考：作者为什么说春天是“寂静”的？

11、从文中划出相关语句。归纳：第七段：“这些喷雾液、药粉、烟雾剂现在几乎普遍在农场、花园、森林和家庭中使用这些化学药品能够不加选择地杀死任何昆虫，不论其是好是坏；能够使鸟儿不再歌唱，鱼儿不再跳跃于水中，能够以一层剧毒物质覆盖在叶片表面或长期滞留在土壤中。”2、以学习小组为单位，合作完成：找出每段的关键句，概述各段重点。地球上的生物与环境互相作用，人类在近代获得力量去改变大自然。这种力量影响到了生物赖以生存的环境。生物与环境适应要相当长的时间，而现代世界的人却没时间去适应。人类因急躁轻率的步伐制造出新的辐射和化学物质。适应这些化学药品要很长的时间，但人类却以极快的速度在生产。这些化学药品有许多用于人

12、类对自然的战争。因这些药品的普及而造成环境的破坏。这些药品的使用导致了恶性循环。这种心态的原始性和非理性。文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N

13、9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文

14、档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT

15、4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z

16、5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP

17、1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P

18、10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B13、你认为文章要告诉我们的主旨是什么？明确：这篇课文以科学详实

19、的资料，以实事求是的精神，反映了人类广泛使用化学农药给周围环境所带来的危害，呼吁人们放弃那些愚蠢的做法，要善用科学，不能让科学的东西危及人类本身。五、写作手法讨论对比手法的运用是课文的一大特色：1.漫长历史中生物对环境的微弱影响与20世纪中叶人类对环境的巨大改变对比。（突出人类对环境的影响）（“在很大的程度上，地球上动植的形体和习性是由环境造成的，相对于地球的漫长历史，反向作用即生物对其环境的实际影响较小。”“只有在 20 世纪较短的时光瞬间中，一个物种人才获得了有效力量去改变他所在世界的大自然。”）2.把人类急躁轻率的步伐与自然界稳健的步履对比。（突出化学药品的危害）（“由核爆炸释放到空中的

20、锶90 以放射性尘埃的形式随雨水或漂浮物落到地球上，留在土壤里，进入地上生长的草、玉米或者小麦等植物体内，最后钻进人体，停留在骨骼里直到人死去。”“同样，喷洒在农田、森林或者花园里的化学药品长期留在土壤中，进入活的生物体内，在一种毒性和死亡的连锁反应中从一个生物体传到另一个生物体；或者随着地下溪水神秘地流淌直到冒出地表，通过空气和阳光的化合作用构成新形式，毒死植物，使牲畜得病，对那些饮用原本纯净的井水的人们造成不知不觉的危害。”）文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B

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25、3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3

26、 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P

27、9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B13.再如把人对自然环境适应的缓慢与人类发明制造化学药品的惊人速度对比。（突出人类无法适应被污染的环境）（“要生成现今栖居在地球上的生物需要亿万年的时间在这漫长的时间里，生物不断发展进化，种类越变越多，达到一种同其环境相适应、相平衡的状态。”“单是在美国，每年就有约500 种新的化学药品需要人的动物的身体以某种方式去与之适应，它们完全

28、超出了生物学经验的范围。”）作用：有效地传达了作者所强调的信息，突出了人类滥用化学药品改变自然力量的可怕，突出了滥用化学药品的巨大危害，使文章有一种强烈的震撼力量。六、语言探讨：富有感情色彩而又形象生动是科学小品的语言特色，请在文中找出例句，说说所表达的思想感情。举例归纳：“在当今对环境的普遍污染中，化学药品是辐射线的凶恶但却被人忽视的同谋，它们共同改变着世界上生物的根本性质。”（第二段）分析：这句话形象地表现出了化学药品的危害极大，隐蔽性极强，容易被人忽视，意在唤起人们的注意，表达了作者迫切的心情。“人甚至连自己创造出来的魔鬼都认不出来。”（第二段）分析：引用施威策的话，运用比喻手法，进一步

29、指出这种化学药品让人们或者动植物不知不觉地受到危害，增强说服力。“这些化学药品不应称作 杀虫剂，而应称为杀生剂。”（第七段）文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H

30、3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10

31、P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4

32、B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码

33、:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4

34、D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7

35、 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1分析：“杀虫剂”与“杀生剂”一字之差，但表达

36、的感情却有极大差别，“杀虫”指这些化学药物的功用是“杀虫”，而“杀生剂”的“杀生”则表现了这些化学药物的危害，作者悲愤之情溢于言表。文句研读1在过去的四分之一世纪里，这种力量不仅增大到了令人不安的程度，而且其性质也发生了变化。这句话中“这种力量”具体是指什么？“其性质也发生了变化”是怎样的“变化”？这句话中“这种力量”具体是人类改变大自然的力量，其性质的变化是由改造大自然变为污染、危害大自然。2阿尔波特?施威策所说“人甚至连自己创造的魔鬼都认不出来”，这句话是什么意思？人类觉得自己在对世界进行改造，实际是在对世界进行破坏，但自己并未觉察，甚至对污染后的新形势、新情况也难以预料，难以把握，这也正

37、是污染的可怕性。3作者为什么说“但在现代世界里人们没有时间去适应世界的急速变化”？时间是人类适应环境的最基本的因素，而这个适应时间不是若干年，而是若干世代、千百年的漫长时间，但人类总在不断制造新药物、新污染。两者不成正比，必然会产生大问题。4这些化学药品不应称作“杀虫剂”，而应称为“杀生剂”。虽然人类使用的化学药品的目标或许仅仅是屈指可数的几种杂草或文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4

38、B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码

39、:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4

40、D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7

41、 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8

42、R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H

43、3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10

44、P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1昆虫，但这些化学药品却同时能够不加选择地杀死任何昆虫。“这些化学药品不应称作杀虫剂，而应称为杀生剂。”“杀虫剂”与“杀生剂”一字之差，但表达的感情却有极大差别，“杀虫”指这些化学药物的功用是“杀虫”，而“杀生剂”的“杀生”则表现了这些化学药物的危害，作者悲愤之情溢于言表。5“药物的使用过程似乎卷入了一个永无终点的螺旋”？药物使用的特点是永无终点，恶性循环，逐步升级，破坏日趋严重。6这门科学在使用这些武器对付害虫的

45、同时也打击整个地球。虽然人类使用的化学药品的目标或许仅仅是屈指可数的几种杂草或昆虫，但这些化学药品无法做出选择，只能杀死任何杂草或昆虫，而且这些化学药品残留在生态环境中产生持久的危害。七、读写训练：请发挥想像，描述一下“寂静的春天”是一种怎么样的景象？八、拓展延伸：除了课文里提到的化学药品因素外，还有哪些因素会使地球上出现“寂静的春天”？人类需要做些什么呢？归纳：1、除了化学因素外，会使地球上出现“寂静的春天”的因素还有：水污染、资源枯竭、能源危机、粮食短缺、人口爆炸、生物多样性丧失、技术危机等等。2、人类需要做的是：保护环境、爱护地球；遵从发展规律，不轻率躁进，破坏环境；减少化学药品的使用等

46、。文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:

47、CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D

48、2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7

49、HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R

50、3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3 ZV10P9N9M4B1文档编码:CT4E4D2Z5M7 HP1N8R3P10H3