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1、根据鲸鱼的发明了潜水艇,根据蜻蜓发明了直升机,根据蝙蝠发明了雷达,10 蝙蝠和雷达,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,
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3、状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,雷达： 是利用发射和接收无线电波进行目标探测和定位的装置。雷达发射电磁波对目标进行照射并接收其回波，这样可以测定目标的方向、距离、大小等。雷达广泛应用在军事、气象、航海、航空等方面。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才
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7、路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,我会写,蝙,蝠,捕,蛾,蚊,避,锐,铛,蝇,揭,碍,荧,半包围结构,上下结构,左右结构,词语解释,【横七竖八】 【敏锐】 【障碍物】 【荧光屏】,朗读课文，说说文章的主要内容，并理清文章层次。,本文主要讲科学家经过_，揭开了蝙蝠_的原因
8、，并从中受到启发，给飞机装上了_，解决了飞机在夜间_的问题。,反复试验,能在夜间飞行,雷达,安全飞行,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成
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10、才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,第一部分（ ）：提出问题，飞机怎么在夜间安全飞行。 第二部分（ ）：_次试验，证明蝙蝠飞行靠的是_和_。 第三部分（ ）：受到启发，给飞机装上_。,1、2,37,8,三,嘴,耳朵,雷达,自由读1、2自然段，想一想：课文为什么一开始就写飞机在夜航？,引出问题,在漆黑的夜里，飞机怎么能安全飞行呢？,清朗的夜空出现两个亮点，越来越近，才看清楚是一红一绿的两盏灯。接着传来了隆隆声，这是一架飞机在夜航。,在漆黑的夜里，飞机怎么能安全飞行呢？原来是人们从蝙蝠身上得到了启示。,作者用设问句进行过渡，承上启下
11、，点明了飞机与蝙蝠的关系。,设问句,蝙蝠是在夜里飞行的，还能捕捉飞蛾和蚊子；而且无论怎么飞，从来没见过它跟什么东西相撞，即使一根极细的电线，它也能灵巧地避开。,障碍物很小。,从哪里可以看出蝙蝠夜间飞行的本领高超？,难道它的眼睛特别敏锐，能在漆黑的夜里看清楚所有的东西吗？,加强语气，推断蝙蝠夜间能够安全飞行的条件。,反问句式,细读文章46自然段，分小组讨论：为了探索蝙蝠能在夜间安全飞行的条件，科学家进行了怎样的试验？得出了什么结论？,第一次,蝙蝠夜行探路是否依靠眼睛。,在一间屋子里横七竖八拉了许多绳子，绳子上系着许多铃铛。把蝙蝠的眼睛蒙上，让它在屋子里飞。,铃铛一个也没响。,蝙蝠夜行探路与眼睛无
12、关。,第二次,蝙蝠夜行探路是否依靠耳朵。,把蝙蝠的耳朵塞上，让它在屋里飞。,蝙蝠就像没头苍蝇似的到处乱撞，挂在绳子上的铃铛响个不停。,蝙蝠夜行探路与耳朵有关。,第三次,蝙蝠夜行探路是否依靠嘴。,把蝙蝠的嘴封住，让它在屋里飞。,蝙蝠就像没头苍蝇似的到处乱撞，挂在绳子上的铃铛响个不停。,蝙蝠夜行探路与嘴有关。,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元
13、成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元
14、成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,蝙蝠是怎么用嘴和耳朵配合起来探路的？,它一边飞，一边从嘴里发出一种声音。这种声音叫做超声波，人的耳朵是听不见的，蝙蝠的耳朵却能听见。超声波像波浪一样向前推进，遇到障碍物就反射回来，传到蝙蝠的耳朵里，蝙蝠就立刻改变飞行的方向。,用自己的话概括蝙蝠的探路过程。,天线,无线电波,荧光屏,嘴,超声波
15、,耳朵,雷达的,相当于蝙蝠的,科学家模仿蝙蝠探路的方法，给飞机装上了雷达。所以飞机在夜里飞行也十分安全。,思考：课文结尾为什么再次写飞机夜航？,与课文第2自然段_。原来飞机夜里能够安全飞行，是因为_ _。,相呼应,有了从蝙蝠身上受到,启发后发明的雷达,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,状元成才路,
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