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人教2003课标版《Using LanguageⅡ》PPT课件优质课下载
Before you read the text , have a
quick glance at it and then predict:
Q1: What is the text about?
Q2: What do the pictures show you?
Q3: What is the chart about?
Step 2 Difficult words and expressions.
1. pollinate---pollinator---pollination
2. evolve---evolution
3. nectar
4. pollen
5. be attached to
6. characteristic
给...传粉---传粉媒介---授粉
进化---进化, 演变
花蜜
花粉
附着在...上，粘在...上
特性，特征
Step 3 Listen to Para 1-3, answer the following questions, and then compare notes .（见学案）
1.What is the advantage for animals of visiting flowers?
2.Why do some plants need animals?
3.How does an animal pollinate a flower?
4.What features of a flower are important in attracting animal pollinators?
5.What kinds of animals are most flowers pollinated by?
Step 4 Read the chart and tell whether these sentences are true or not. （见学案）