Soil air supplies plants and microorganisms with what gases needed for life processes?
a. nitrogen and helium
b. oxygen and methane
c. carbon dioxide and oxygen
d. nitrogen and carbon dioxide
C
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Tianjin lies in the ________ industrial region of China
A) Hong Kong B) Sony C) Bohai Rim D) Minnan Delta
Which naturalist stated that regulated hunting can maintain a proper balance of wildlife?
A. Rachel Carson B. Lewis Thomas C. John Muir D. Aldo Leopold
The point on the surface of the Earth directly above the place where an explosion occurs is called:
a. Earthquake epicenter b. Earthquake focus c. Earthquake hypocenter d. Earthquake trace
The ________ have been called Latin America's "lost decade" because of the slowdown in growth and deterioration in living standards that occurred during that decade
A) 1870s B) 1950s C) 1980s D) 1930s E) None of these is the "lost decade" of Latin America.