In an op-amp the output stage is usually
A) a class A amplifier B) a push-pull class B amplifier
C) a class D amplifier D) none of the above
B
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The combustion of biomass results in an almost complete reduction of ____ emissions
a. sulfur oxide c. carbon monoxide b. coal d. particulate
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Flowers to be used in arrangements are called _____
A) potted plants B) flowering plants C) cut flowers D) carnivorous
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The hormone that is released by the kidneys in response to low oxygen levels in kidney tissues is
A) angiotensin. B) cortisol. C) erythropoietin. D) renin. E) epinephrine.
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In a standard hydraulic system, a diverter valve _____
a. stops fluid flow b. has a rotating core c. has the same function as a check valve d. redirects the flow from one component to another
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