The ____ fuel cell is the most commonly used fuel cell in commercial applications.

A. molten carbonate
B. direct methanol
C. phosphoric acid
D. solid oxide


Answer: C

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In 1857, the Supreme Court ruled in the Dred Scott decision that

A. slavery was inconsistent with the constitution and must be abolished. B. protection of slavery was guaranteed in all the territories of the United States.  C. slavery would be constitutional only in those areas that were already slave territories. D. abolition of slavery would be done only in those areas in which it is already abolished. E. slavery was constitutional, but the slave trade was unconstitutional.

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One of the major photosynthetic enzymes in plants is ribulose-diphosphatase

Indicate whether the statement is true or false

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During red blood cell development, what is the term given to the first anucleate cell?

A) reticulocyte B) erythrocyte C) myeloid stem cell D) hemocytoblast E) proerythroblast

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Technician A uses a scan tool to clear stored DTCs. Technician B says that clearing DTCs will also clear all of the noncontinuous OBD-II monitors. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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