举一反三
- helping to 3)______________ and save energy. A: prove security B: improve C: improving security D: improve security
- The ______cell can convert the energy of sunlight into electric energy.
- _____ is a machine by which electrical energy is transformed into mechanical energy.
- In the future, China's energy consumption will still be dominated by fossil energy, in which coal is the main energy.
- The production process of thermal power plant is to convert () of fuel into electric energy. A: chemical energy B: heat energy C: mechanical energy D: kinetic energy
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Apparent metabolizable energy（AME）is the remaining energy after subtracting（ ）from the gross energy. A: Fecal energy B: Urine energy C: Metabolizable fecal energy D: Gas energy E: Endogenous urine energy
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Shell plays a key role in helping to meet the world's growing demand for energy.
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Wherever there is matter, there is energy; all changes of matter _______ changes in the form of the energy.
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中国大学MOOC: The energy that the sun radiates to earth every is equivalent to the sum of all the fossil fuel energy of the energy.
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Which of the following statements is NOT true（） A: Getting off to work with a minimum effort helps save one's energy. B: Dr. Kleitman explains why people reach their peaks at different hours of day. C: Habit helps one adapt to his own energy cycle. D: Children have energy cycles, too.