第34题: [单项选择]Passage Three Questions 33 to 35 are based on the passage you have just heard. A. The need to exercise the memory. B. How the brain differs from other body tissues. C. The unconscious learning of a physical activity. D. How nerves control body movement. 参考答案:A 答案解析:[听力原文] What does the speaker illustrate with the example of our muscle