The ______cell can convert the energy of sunlight into electric energy.
The ______cell can convert the energy of sunlight into electric energy.
_____ is a machine by which electrical energy is transformed into mechanical 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.
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
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
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
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
Wherever there is matter, there is energy; all changes of matter _______ changes in the form of the energy.
Wherever there is matter, there is energy; all changes of matter _______ changes in the form of the energy.
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.
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.
单选题 ( 2.0 分 )<br/>Which of the following statements is true according to the<br/>passage? A: Nuclear power is a safe and reliable energy source. B: solar energy is always available as a source of energy. C: Water and steam energy has been successfully used in some<br/>countries. D: The real solution to energy crisis lies in natural sources of<br/>energy.
单选题 ( 2.0 分 )<br/>Which of the following statements is true according to the<br/>passage? A: Nuclear power is a safe and reliable energy source. B: solar energy is always available as a source of energy. C: Water and steam energy has been successfully used in some<br/>countries. D: The real solution to energy crisis lies in natural sources of<br/>energy.
Energy is ___ for life, and food was the first source of energy. A: superficial B: variable C: essential D: prosperous
Energy is ___ for life, and food was the first source of energy. A: superficial B: variable C: essential D: prosperous
In an isochoric (等容) process, all the energy added as heat remains in the system as an increase in internal energy.
In an isochoric (等容) process, all the energy added as heat remains in the system as an increase in internal energy.