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需信息;最后就已有信息,鼓勵學生發(fā)表他們對于沙漠化以及防 治的觀點及建議。 Teaching aims: After learning this section, the students will be able to 1. listen and draw conclusion 2. read for information 3. present their point of view Teaching procedures: Step 1 lead in (PPT47) 1. We have talked so much about environmental problems in this Unit. With the problem getting worse and worse, our earth is crying. 2. Give the example of remains of Loulan, which was destroyed by desertification. 3. To raise people’ s awareness of this serious situation, posters are needed. [Explanation] 以日