【人教课标选修9】Unit 4 Exploring plants

     I am appealing on behalf of the refugees.我代表那些难民提出恳求

     He appeal to us for help.他恳求我们的帮助

   2）诉诸，诉之于

     Appeal to the law / a higher court

   3）事物引起（人的）兴趣，有吸引力，投入所为

      Does the film appeal to you?

    n. make an appeal to 吸引, 诉之于

Sentence structures

1.      It was not until the eighteenth and nineteenth centuries that the exploration of the botanical world began on a large scale.

2.      Not only did Fortune introduce over 120 species of plants to western gardens but he also shipped 20000 tea plants from…

Period Four

Aim:

To make students understand the text

         Flowers and their animal pollinators

Contents:

I.  Questions:

1)     What is the text about?

2)     What do the pictures show you?

3)     What is the chart about?

4)     What is the advantage for animal of visiting flowers?

5)     Who do some plants need animals?

6)     How does an animal pollinate a flower?

7)     What is nectar?

8)     What kinds of animals are most flowers pollinated by?

II. Language points

1.      over time 随着时间的推移

over the weekend 整个周末里

over these years 在这些年里

2.      reward sb with sth用…回报某人

3.      attach… to依附于…上

4.      pass on to把…往下传

5.      adapt to 使…适应

The spokesman adapts his speech to suit the interests of his audience.

He has adapted to the climate here.

6.      describe … as 把…描述成

7.      guide sb to s.p.把…领到…

8.      land on 登陆

9.      provide sb. with sth向…提供

provide sth for sb.

provide for 养活，规定

III. Difficult sentences

1)     Pollen becomes attached to the animals during its visit to a flower and is then passed on to another plant’s blossom on its next visit.动物接触一朵花后,花粉就附着在它身上,动物接触下一种植物的花时就把这些花粉传到花朵上.

2)     Through evolution, most flowers have become adapted to attract specific types of pollinators.通过进化,大部分花朵变得适于吸引特殊种类的花粉传播者.
 

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