Writing requires concentration and energy.
举一反三
- To practice calligraphy requires the basic tools of “four treasures of study”, writing brush, ___, paper, and ___, as well as much concentration on guiding the soft writing brush charged with fluid ink, and writing on the paper where the ink will diffuse quickly. A: ink stick B: ink pot C: water dish
- 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