题目详情:
| What can dogs see The answer to this
question is disappointing; dogs {{U}} (67) {{/U}} see no colors. The
answer is disappointing {{U}} (68) {{/U}} many owners of dogs will
naturally be sorry that their dogs cannot see colors which to them are
beautiful. But then, they may {{U}} (69) {{/U}} that clogs have an
extraordinary {{U}} (70) {{/U}} sense of smell. The dog’s world is
{{U}} (71) {{/U}} in enjoyable smells, {{U}} (72) {{/U}} it may be
colorless. How do we know if dogs are color-blind This has been tested in the same way {{U}} (73) {{/U}} it has been discovered what dogs can hear. The {{U}} (74) {{/U}} has been made to train dogs to salivate (流口水) when they are shown {{U}} (75) {{/U}} different colors. Such experiments have {{U}} (76) {{/U}} failures; it has been found impossible to make dogs {{U}} (77) {{/U}} colors from A. distinguish B. discard C. discharge D. dismiss 知识点总结:暂无相关知识点,敬请期待! 我来回答: 提交
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