英语与阅读海豚dolphins课件.ppt

Dolphins Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Dolphin Dolphins are marine mammals closely related to whales and porpoises. There are almost forty species of dolphin in 17 genera. They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, eating mostly fish and squid. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Rissos Dolphin bottlenose dolphin Orca Killer Whale Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Commersons dolphin Dusky dolphin Indo-Pacific hump-backed dolphin Sousa chinensis Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Behavior Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Intelligence Dolphins are often regarded as one of Earths most intelligent animals, though it is hard to say just how intelligent. Comparing species relative intelligence is complicated by differences in sensory apparatus, response modes, and nature of cognition. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Social behavior ＊Dolphins are social living in pods of up to a dozen individuals. In places with a high abundance of food, forming a super grouping may exceed 1,000 dolphins. ＊Dolphins can establish strong social bonds; they will stay with injured or ill individuals, even helping them to breathe by bringing them to the surface if needed. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Sleeping