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《Reading and vocabulary》最新PPT课件优质课下载
Please look at these pictures.
How beautiful they are!
How beautiful it is !
Which is the largest tropical rain forest in the world?
Amazon tropical rain forest
Which is the largest desert in the world?
The Sahara Desert
But one day something happened .
Look at the picture.
The sand almost buries the car.
The sand almost buries the house.
People try to clear the stand.
What natural disaster is it ?
It is a ________ . It is very__________.
sandstorm
frightening
The day before yesterday
Yesterday
Today
What’s the cause of sandstorm?
The cause of sandstorm:
cutting down too many trees
desertification (沙漠化)
high temperature and little rain
rapid spread of urbanization