International expositions act as the cultural and commercial links between Yunnan and the outside world.
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Why do pumice stone float on the surface of the water?
A. They are comparatively smaller.
B. They contain special materials.
C. They are not real stones.
D. There are pores in the stone.
Why did volcanoes scatter around Tengchong?
A. Tengchong is located in the boundary area between the Eurasia Plate and the Indian Plate.
B. The geothermal energy frequently release in Tengchong.
C. The craters can be found everywhere in Tengchong.
D. Volcanoes always erupt in Tengchong.
What are the Tengchong volcanoes?
A. active volcanoes
B. craters
C. dormant volcanoes
D. extinct volcanoes
What are the three most famous volcanoes in the national geological park of Tengchong?
A. Mount Daying, Mount Guipo and Mount Xiaokong
B. Mount Dakong, Mount Xiaokong, Mount Guipo
C. Mount Dakong, Mount Xiaokong and the Black Mountain
D. Mount Daying, Mount Xiaokong and the Black Mountain
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