Most of Tibet has an altitude greater than 5000 metres, where the atmospheric pressure is about 500 hPa. At this altitude, Tibetans live higher than what percentage of air molecules in the atmosphere?
A)about 75%
B)about 25%
C)about 10%
D)about 50%

Question

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The Answer of Most of Tibet has an altitude greater than 5000 metres, where the atmospheric pressure is about 500 hPa. At this altitude, Tibetans live higher than what percentage of air molecules in the atmosphere?
A)about 75%
B)about 25%
C)about 10%
D)about 50%

Most of Tibet Has an Altitude Greater Than 5000 Metres