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1、1/4 黄河是怎样变化的资料搜集资料的搜集在课前或课后布置，并适机交流，若在学习完本文后布置，则可在“展示台”中交流与展示。不管是课前还是课后搜集资料，都要培养学生“有目的搜集资料”的能力，即“搜集有关黄河的资料，为治理黄河出出主意”，有兴趣有条件还可以写成调查表、建议书等寄送有关部门。选自人民教育出版社网站海蜇，早在 5 亿多年前就漂浮在海洋里，是一种极古老的腔肠动物，还是预报风暴最早、最准确的“顺风耳”。因为它的“耳朵”（细柄上的小球)中有小小的听石，风暴产生时发出的次声波（由空气和波浪摩擦而严生，频率为8赫兹-13 赫兹，传播比风暴、波浪的速度快）冲击小小听石“球”壁的神经感受器，于是海
2、蛰就稳约听到了即将来临的风暴的隆隆声，便警惕地离岸游向大海避灾。人们模拟海蛰感受次声波的器官，设计成功精确的“水母耳”仪器。它由喇叭、接受次声波的共振器和把这种振动转变为电脉冲的转换器以及指示器组2/4 成。将这种仪器安装在船的前甲板上，喇叭做 360旋转。当它接收到8 赫兹13 赫兹的次声波时，旋转自动停止，喇叭所指示的方向，就是风暴将要来临的方向。指示器还可以告诉人们风暴的强度。这种仪器，可提前15 小时左右预报风暴。鲎，早在 4 亿多年前出现于地球上，是老资格的海洋节肢动物。但它进化不大，眼睛却很奇特-有 4 只。前面的两只小眼直径只有0.5 毫 M左右，都有晶状体和视网膜；视网膜中有5
3、0 个-80 个感光细胞，对近紫外辐射最敏感，但刺激停止后，小眼反应即降为零。对鲎行为影响最大的是两侧的复眼。受光束照射后，复眼产生脉冲。一只眼受光束照射，一只眼产主脉冲；两只眼同时受光束照射，两只眼同时产生脉冲，但比光束照射一只眼时产生的脉冲的频率略低些。人类受其启示，研制成功一种电子模拟装置，能解10 个元文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H
4、8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M
5、4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:C
6、Z9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK
7、4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX
8、1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码
9、:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4
10、HK4H8E7O2A10 ZX1M4W7B2J23/4 素构成的网络方程，应用这个原理制成的电视摄影机，能在激光下提供清晰度较高的电视影象。鱼能在伸手不见五指的海里与海流搏斗，并能准确地发现障碍物，确定正确的方向。这些本领十分奇特。科学研究表明，这些行为是鱼类使用身体上的侧线完成的，它是鱼类的“第六感”系统，由数千个延伸整个身体的细小毛发细胞组成。即使是在完全黑暗的海水中，侧线也会对鱼类身体周围的水流做出反应，从而正确地侦测到障碍物和水流的动物。不久前，伊利诺伊州立大学的科研小组仿生开发出一套可使机器人拥有“第六感”的人工侧线，它与鱼类的侧线系统相似。这种人工侧线由许多排列在表面的，类似于发束
11、的微小硅片组成，每一条都通过微较链连接在一个电子感应器上。当水流与硅束接触时，硅束会因不同的水流速度而弯曲，使传感文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B
12、2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8
13、Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E
14、7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W
15、7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9
16、H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H
17、8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J24/4 能侦测到硅束弯曲的角度和方向，从而帮助机器人找出它想去的方向。文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J
18、2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9
19、I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O
20、2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B
21、2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8
22、Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E
23、7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2文档编码:CZ9H8Y9I2A4 HK4H8E7O2A10 ZX1M4W7B2J2