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狗会不会笑呢?
2007-11-06 15:08:04
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Have you ever had the feeling that your dog is laughing at you? New research suggests maybe he is!
Willie, the only ape (类人猿)at Atlanta Zoo
Terry Maple, a psychology (心理学)professor (教授)working at the zoo, thought the gorilla (大猩猩)would enjoy playing tug-of-war(拔河). So zookeepers threw one end of thick rope into the gorilla’s enclosure(围栏) and handed the other end to a team of ten men. When the gorilla picked up the line, the men started to pull. But Willie stepped on the rope, and the men could not move him! 
Then the human team made a tactical(战术的) error.(错误) “Gorillas don’t like to make eye contact,” says Maple. “So Willie was glancing away.” Thinking he wasn’t paying attention, the straining (劳累的)humans relaxed. Willie quickly lifted his foot and yanked(猛拉) the rope. “He was laughing on the inside,” says Maple, as the men slipped and fell into a heap.(堆) Gorilla, one; men, zero!
Bongo, an African gray parrot
Bongo didn’t get along with Paco, another parrot. “She was always kidding Paco,” says Sally Blanchard, a parrot behavior expert.

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