根据下列材料请回答题: What is responsible for processing a signal sent by people's eyes? A.Oxygen-rich blood. B.Neurons in the brain. C.A small region of the brain. D.The central part of the brain.
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答案解析:
What is the author mainly discussing in the passage?
What is the author mainly discussing in the passage?A.Fors and Againsts of DNA t