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  3. The most famous case of an animal said to be capable of counting is that of a horse in Germany called Clever Hans. The episode【B

The most famous case of an animal said to be capable of counting is that of a horse in Germany called Clever Hans. The episode【B

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问题 The most famous case of an animal said to be capable of counting is that of a horse in Germany called Clever Hans. The episode【B1】______ at the beginning of the present century. The horse’s owner【B2】______ that animals can think and reason as we can and that this【B3】______ can be brought out by training the animals. He trained Clever Hans to give the answers to【B4】______ of arithmetic; the horse gave the【B5】______ answer by tapping the right number of times with its forefoot.
    The animals gave the correct answers not only to【B6】______ but also to other processes of arithmetic, including【B7】______ fraction to decimals. It gave the right answers too when the questions were not spoken but【B8】______ to it written on a card.
   【B9】______ . The committee, after a careful investigation, found【B10】______ , and that he had not purposely trained his horse to stop tapping, and so to give a correct answer, by giving it a slight clue as is done with performing circus (马戏团) animals. The absence of such trickery (诡计) was proven by the fact【B11】______ .
【B3】
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