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1. Read the three questions, while the students listen and follow. 2. Give the Ss several minutes to discuss the questions. 3. Collect answers from the whole class. 4. Check the answers while discussing. T: I’ll read the three questions for you. You should listen to me carefully. (If students don’t know how to discuss, show them an example.) For example, medicine. When someone gets serious illness, he will go to the hospital. The doctor will examine him. He will take his temperature, measure his blood pressure and give him an X-ray, or a CT. For the whole process of the examination, what kind of science has been used? S1: Biology. S2: Chemistry. T: So we can say medicine combines biology and chemistry. What about biochemistry and geophysics? S3: I think biochemistry combines biology and chemistry. S4: Geophysics combines geology and physics. T: What about astronomy? S5: Physics. S6: Mathematics.，大小：70.0 KB