The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __________.
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The telecity is a city whose life, direction, and functioning are largely shaped by telecommunications. In the twenty first century, cities will be based more and more on an economy that is dependent on services and intellectual property. Telecommunications and information networks will define a city's architecture, shape, and character. Proximity in the telecity will be defined by the speed and bandwidth of networks as much as by geographical propinquity. In the age of the telecity, New York and Singapore may be closer than, say, New York and Arkadelphia, Arkansas.
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What does the function of the last paragraph?
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The key functions of lubricants include ().
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