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Electrical devices (仪器) could soon use power made by human energy. Scientists say they have develop...

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h has more quantity of sensitive electrical devices.  It can measure very small changes in the Earth’s surface.  Require less Human Resources.  More accurate on predicting site of earthquakes.  
harmless  deadly  effective  repulsive  
A.2 could best be replaced by ______. harmless deadly effective repulsive  
It makes up five per cent of all electricity consumption in the United States.  Electrical devices that have internal or external clocks consume standby power.  Standby power is not of significance compared to the whole consumption of electricity.  Standby power is important to maintain the normal functions of electrical devices.  
3-5 watts  13-30 watts  300-700 watts  It depends.  
I/O devices  disk  memory  CPU  
they carl recharge their batteries that have been exhausted.  they do not interfere with the normal use of electricity in the house.  their users do not have to bother to turn them on every time they want to use them.  they can stay warmed up and are ready for use at any moment.  
harmless  deadly  effective  repulsive  
without that    without which    without what    without it  
Frequency meter  Ohmmeter  Induction voltage regulator  Current transformer governor  
Supportive  Critical  Indifferent  Worrie  
Steel brush  Fine emery cloth or steel wool  A section of the removed compression ring  A case hardened scraper  
Electrical energy  Thermal energy  Potential energy  Kinetic energy  
Transducer  Reducer  Transformer  Rectifier  
the electricity thief who steals electricity at one’s home.  electricity to power electrical appliances even when they are turned off.  electricity to power electrical appliances when they are turned on.  electricity waiting to be used when electrical appliances are turned of  
creating a system that could be set as an example for all smart grids.  making use of wind energy to replace electrical power.  supplying electricity to homes and businesses without interruption.  the efficiency when transmitting electricity for long distances.  

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