North American businesses tend to prefer building new, flat buildings on larg pieces of land rather than revamp existing buildings on the assumption that land, energy and resourde are in unlimited supply.
A.
T
B.
F
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举一反三
【单选题】在放大电路中,当负载R L =1KΩ时,输出电压为1V,负载电阻断开时,输出电压上升到1.2V,则该放大电路的输出电阻R 0 为( )。