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Passage3(3) In the Chinese culture,people eat thousand-year-old eggs and they are edible and delicious,but do you think people from other cultures would like to eat these?You are going to hear a lecture on food choices and food norms related to different cultural and social groups.Listen carefully and take notes to answer the following questions. What is this lecture mainly about? What are the structures,or outlines,or subpoints of this lecture? How much energy does human brain use every day? How do people know whether certain food is appropriate to eat or not? Why westerners do not eat cats or dogs?