The theory of trade indicates:
a. All people benefit from trade.
b. Consumers in exporting countries pay lower prices.
c. Producers in importing countries receive higher prices.
d. All of the above.
e. None of the above.
e
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Portland cement is a _____ cement, which means that it sets and hardens by a chemical reaction with water.
A. hydraulic B. natural C. hydrated D. lime-sand
In a semi-hermetic compressor, _____.
a. the compressor and drive motor share a common housing b. the drive motor is mounted outside of the compressor housing c. the pistons can easily be accessed and serviced in the field d. rotating scroll plates compress the refrigerant progressively
Un tipo de concreto que puede colocarse sin necesi- dad de vibrado es el _____.
a. concreto masivo b. concreto de autocompac- tación c. concreto preempacado d. concreto pesado
A mat of reinforcing bars used in a slab is usually supported above the subgrade at a distance of _____.
a. 3 inches b. 4 inches c. 5 inches d. 6 inches