Environmental Science
In summer, humid regions typically have ________ daily temperature ranges and _______ maximum temperatures than drier regions.

Smaller, higher
Larger, higher
Larger, lower
Smaller, lower

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Environmental Science
Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly:

25% of the air molecules in the atmosphere
75% of the air molecules in the atmosphere
50% of the air molecules in the atmosphere
10% of the air molecules in the atmosphere

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