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Both humans and cetaceans have large brains with an expanded and distinctive
Both humans and cetaceans have large brains with an expanded and distinctive
游客
2024-01-03
49
管理
问题
Both humans and cetaceans have large brains with an expanded and distinctively folded surface, the cortex. The cortex is the
dominant
association center of the brain, where abilities such as memory and sensory perception are centered. Cetaceans have larger brains than ours, but the ratio of brain to body weight is higher in humans. Again, direct comparisons are misleading. In cetaceans it is mainly the portions of the brain associated with hearing and the processing of sound information that are expanded. The enlarged portions of our brain deal largely with vision and hand-eye coordination. Cetaceans and humans almost certainly perceive the world in very different ways. Their world is largely one of sounds, ours one of sights. [br] The word "
dominant
" in the passage is closest in meaning to
选项
A、local
B、natural
C、chief
D、specific
答案
C
解析
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