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Correct Answer: B) Semiconductors.
Correct Answer: C) Oxygen.
Correct Answer: D) A flow of electrons.
Correct Answer: D) There is a continuing supply of wind energy.
Correct Answer: D) Troposhphere.
Correct Answer: A) Lower; faster.
Correct Answer: A) Blades, shafts, gears and generators.
Correct Answer: C) 1.3 million.
Correct Answer: D) Less than 25%.
Correct Answer: A) Crystalline Silicone.