Where cannot we find the “columnar joints”?
A. Fangshan in Nanjing
B. Leshan in Chengdu
C. Ermei Mountain in Sichuan
D. Tengchong in Yunnan
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The Great Gorge of the Nu River extends for more than ______ kilometers .
A. 600
B. 400
C. 200
D. 100
After Nu River runs into Myanmar, it is called the ______.
A. Mekong River
B. Irrawady River
C. Red River
D. Salween River
Traditional ______ enable local people to go across the Nu River conveniently.
A. wooden bridges
B. iron bridges
C. ziplines
D. cable cars
In Yunnan, the domestic river systems are the ______ and the ______.
A. Lancang river sysytem
B. Nanpan–Zhujiang river-system
C. Jinsha-Yangzi river-system
D. Nu river sytem