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外研2003课标版《Reading and speaking》集体备课PPT课件优质课下载
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B
2. Why does the surface of Mars look red?
The soil of Mars is rich in iron oxide.
Infrared radiation is high.
The soil mainly consists of silicate.
Vocanoes erupt frequently.
A
3. What is the main component of atmosphere on Mars?
oxygen
nitrogen
carbon dioxide
ammonia
C
4. How about the temperature of surface of Mars?
very cold
very hot
A
5. The highest volcano(Olympus Mons) in solar system is on ( )
Earth
Venus
Mars
Saturn
C
The Surface of Mars