What resource base of Mongolia has been recently exploited?
A) minerals
B) labor
C) timber
D) horses
E) hydropower
Answer: A
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Referring to the figure below, at which of the following points are the pressures in the barometer equal?
?
A. points A and C B. points C and D C. points B and D D. points A and D
The three models describing the internal social structure of cities were developed in this city:
A) Sacramento B) New York City C) Seattle D) Chicago E) Boston
Multibeam provides the best modern technique for obtaining seafloor bathymetry, so why hasn't it been used for the entire ocean?
A) It doesn't work where there is ice. B) It is too expensive, requiring many ships many years to survey the entire ocean. C) It doesn't work in deep water. D) Oceanographers simply haven't had time to process all the data.
Pest organisms tend to be
A. Endemic species B. Migratory species C. Generalist species D. Specialist species