3.Hibernating in that way, the animal can sleep all through the winter. You might wonder how it manages to live withut eating for so many months . The answer lies in two facts. The first is that it has stored supplies of fat in its body during the summer and autumn. The second is conneted with the main use the body makes of food---- to supply the energy for movement. We have seen that the hibernating animal reduces movement to far below the ordinary level. Even the movements of the heart and lungs are greatly reduced.The animal hardly makes any movement,hardly uses any energy, and hardly needs any food.
Step5:Homework:Write a summary of the test.
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英语教案－Unit 12 Mainly Revision(一)