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【单选题】
Why was the gorge named by "Tiger-Leaping" ?
A.
A tiger was hunted here.
B.
Tigers could jumpe over the gorge directly.
C.
A rock in the river provided a spot for a tiger to jump across the river.
D.
Rocks in the gorge look like tigers.
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【单选题】How old is the Earth?
A.
1 billion years
B.
180,000 years
C.
4.5 billion years
D.
3 million years
【单选题】In Yunnan, the upstream of the Yangzi River is called the ______
A.
Nu River
B.
Nanpan River
C.
Jinsha River
D.
Yuanjiang River
【单选题】The Great Gorge of the Nu River extends for more than ______ kilometers .
A.
600
B.
400
C.
200
D.
100
【单选题】How does atmospheric carbon dioxide affect the Earth’s climate?
A.
It decays radioactively and produces heat
B.
It reflects solar radiation releasing more heat to the Earth´s atmosphere
C.
It captures more solar radiation trapping in heat in the Earth´s atmosphere
D.
It changes the colour of the atmosphere
【单选题】Which does not indicate that digitalization support more and more operations?()
A.
Ubiquitous computing
B.
Industry
【单选题】After Nu River runs into Myanmar, it is called the ______.
A.
Mekong River
B.
Irrawady River
C.
Red River
D.
Salween River
【单选题】What approximate percentage of the global population lives in cities?
A.
20%
B.
35%
C.
50%
D.
70%