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Which is an invention that improved safety for railway passengers? refrigerated rail cars Pullman sleeping cars time standardization air brakes
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Characteristics of what type of economic system are being described below? 1.economy in which some/all of the basic economic questions answered by central authority 2.trade generally limited to what is produced through the influence of the government a. command economies. b. market economies. c. traditional economies.
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Which is an invention that improved safety for railway passengers? refrigerated rail cars Pullman sl...
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