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The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the _____.
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As a heat engine, （) energy is the source of power by which a diesel enginecan be operate
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_____ the compression ratio, _____ the proportion of the heat energy of the combustion tur
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For many people in the United States who are concerned about the cost of heating homes and
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A．How amber changes shape when heated.B．How clear amber is.C．How common is around the
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The energy______by the chain reaction is transformed into heat.A．releasedB．relievedC．revea
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The United States officials believe the project by the city of Qom isA．a civilian energy p
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