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  3. Dogs are particularly valuable in guiding the blind (a trained dog can learn never to cross a busy street when cars are coming,

Dogs are particularly valuable in guiding the blind (a trained dog can learn never to cross a busy street when cars are coming,

admin2012-03-26  48
问题 Dogs are particularly valuable in guiding the blind (a trained dog can learn never to cross a busy street when cars are coming, even if his master commands him to do so), protecting property, finding lost people, and hunting criminals.
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答案狗的价值体现在它能为盲人引路(训练有素的导盲犬不会穿越车流不息的马路，即使主人发出穿越马路的指令)，保护财产，找寻迷路的人和追捕罪犯。
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