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教学材料：外研版高中英语新教材选择性必修第二册,教学内容：Unit 5 A Delicate WorldMacquarie Island,第二课时：Understanding Ideas,执教人：,Macquarie Island from Chaos to Conservation,out of order 混乱,rotection 保护,Look at the picture and answer the questions.,What animals can you see in the picture?2. What kind of changes would take place if cats, rats and rabbits were introduced to an environment like this?,They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance.,