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补全短文The function of power transmiion/power networks/step-down substations and connected transmiion equipment/transmiion at high voltage/power network operation 2 In()such as U.S.A
some advanced countries/great advantages on economy and environmental protection/good homogenization of distribution/whole proce management is strengthened 3 Circuit breakers are automatically to control electrical power networks/to switch the current which can be from a few amperes/to perform any switching operation after long periods/of the highest importance for high reliability/of the circuit breaker 4,Fuel cells are devices that there is no storage capacity in a fUel cell/further development is under way/as they are being developed there have been some applications/many cells are operated in series to obtain voltages/supply alternating current from fuel cells 5 Many large cities are anything there is still something that can be useful/there is no time to be lost/it can be put to use again/more and more machines are designed for this purpose/building beautifUl cities out of garbage is only a dream 6,The weather in winter They can sleep for a long time/We call this kind of sleep in wintertime “hibernation/Hibernating animals don’t need to eat much because they don’t move/So they don5t need to worry about bad weather and other dangerous animal/As it gets warmer and warmer in spring, the sleeping animals begin to wake up and look around for food 7,The body that is
It circles the Earth and is therefore know as a satellite of the Earth/A satellite stays in orbit because the planet gravitational force keeps pulling it into a circle/The bigger and heavier a body is, the greater is its force of gravity/To get out into space we have to overcome the Earths gravitational pull/Artificial satellite can be used for various purpose 8,The secondary equipments
the equipments that provide protecting, monitoring/the equipments that send the command signal/current values in secondary system/5 A rated current of the current transformer secondary winding/50V rated voltage of PT secondary side 9,A sudden change in the configuration by the operation of a circuit breaker/determine the insulation requirements of transmiion line/the cost of transmiion and line failure rat/at both opening and closing of circuit breakers/by means of circuit breaker dosing resistor in 500kV system 10,The high voltage power transmitted from power planfs step-up
and ash disposal/newly scheduled power substation to step-down substatio/the power 24,the most important pumps
line that transmits the power from step-down It must be located/motor frequency/three substation/the overhead transmiion sets/two of them/it preurizes and
line/lightning frequently happening and heavy raining/large spanning line section 11 ,The aim of introducing market
a wholesale market/a retail market/to agree on the price and quantity to be traded/to register as a market customer/to choose electricity suppliers
12,Electric power is a most
the lack of electricity(a blackout)/its unavailability/social disorder, and even
national tragedy/its growth rate/high electric power consumption per capita 13,There are numerous examples
the research and development/the fake and real items/new chemicals/the intellectual property/physical property
14, Electrical energy is the presence
static electricity/electrical charge/electrical energy/Alternating current/Electrical potential
15,Many people think of
Sustainable/the best known is photovoltaic cells/inefficient/the collected energy is used to heat a fluid/efficient
16,Electrical energy conservation reducing energy consumption can be undertaken at home/making use of alternative clean energy sources
/contributing to climate change/turning the thermostat up in the summer and down in the winter/looking for other opportunities for electrical energy conservation in the home 17,Advanced Distribution Automation The electrical power grid/distribution
systems/at lower voltages/to control smaller entities/for a number of reasons 18,Solar energy is lauded
like satellites in Earth orbit/buildings and futuristic cars/such as a battery/to collect the sun's energy/United States 19, The American idea of
from the very beginning/how much items cost/have paid for/after the sale/The customer service representative 20,The neceity of reliable
developing countries/there are more people/renewable energy systems in particula/highly reliable/For this reason 21, “Look it up in the dictionary
But it was not until 1604 that a book of uncommon English words appeared/Each time, it has been updated/Dictionaries that list all kinds of words are known as general dictionaries/General dictionaries are not the only kind/Thus there are many kinds of special dictionarie
22,temperature,preure,specific Parameters of the medium/the rise in temperature/external forces/heat transfer/internal energy
23,according to the mode of energy Nuclear,wind,solar/supplies power to
users/supplies steam to the user/fuel supply