[填空题]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{{U}} (36) {{/U}} at the beginning of the present century. The horse’s owner{{U}} (37) {{/U}}that animals can think and reason as we can and that this {{U}} (38) {{/U}}can be brought out by training the animals. He trained Clever Hans to give the answers to {{U}} (39) {{/U}}of arithmetic; the horse gave the {{U}} (40) {{/U}}answer by tapping the right number of times with its forefoot. The animals gave the correct answers not only to {{U}} (41) {{/U}}but also to other processes of arithmetic, including{{U}} (42) {{/U}}fraction to decimals. It gave the right answers too when the questions were not spoken but{{U}} (43) {{/U}}to it written on a card. {{U}} (44) {{/U}}. The committee, after a careful investigation, found {{U}} (45) {{/U}}, and that he b/ad not purposely trained his horse to stop tapping, and