更多"What can dogs see The answer to th"的相关试题:
[单项选择]What can dogs see The answer to this question is disappointing; dogs (67) see no colors. The answer is disappointing (68) many owners of dogs will naturally be sorry that their dogs cannot see colors which to them are beautiful. But then, they may (69) that clogs have an extraordinary (70) sense of smell. The dog’s world is (71) in enjoyable smells, (72) it may be colorless.
How do we know if dogs are color-blind This has been tested in the same way (73) it has been discovered what dogs can hear. The (74) has been made to train dogs to salivate (流口水) when they are shown (75) different colors. Such experiments have (76) failures; it has been found impossible to make dogs (77) colors from one another (78) signals for their dinner. This question requires further (79) with other techniques, but so far as the available scientific evidence A. even if
B. while
C. due to
D. because