题型:阅读理解 题类:常考题 难易度:普通
贵州省贵阳市第一中学2018届高三上学期英语适应性月考(一)试卷
Why Do Dogs Watch--and React to--TV?
Domestic dogs can perceive images on television similarly to the way we do, and they are intelligent enough to recognize onscreen images of animals as they would in real life-even animals they've never seen before-and to recognize TV dog sounds, like barking.
A 2013 study published in the journal Animal Cognition showed that dogs could identify images of other dogs among pictures of humans and other animals, using their visual sense alone.
However, there are some differences between ourselves and man's best friend-for one, dogs' eyes register images more quickly than do ours. So older television sets, which show fewer frames(帧数) per second than modern televisions, would appear to a dog to be flickering(忽隐忽现的) like a "1920s movie," said Nicholas Dodman, a veterinary behaviorist(动物行为学家) at Tufts University, in Massachusetts.
Dogs also have dichromatic vision, which means they see a range of two primary colors, yellow and blue. Human vision is trichromatic, so we see the full range of colors, according to Binghamton University's Ask a Scientist web page.
DogTV, an HDTV cable channel designed for dogs, interests canines(犬) because HDTV has a much higher number of frames per second and is specially colored to accommodate dogs' dichromatic vision, said Dodman, who is the channel's chief scientist.
DogTV has modes for relaxation, which shows images like dogs recreate themselves in a grassy field; stimulation, which depicts scenes like dogs surfing in southern California; and exposure which shows things like a dog reacting to a ringing doorbell and obeying commands to adapt to such situations at home.
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