ENERGY - ABILITY TO DO WORK, LIGHT - MAKING THINGS BRIGHT, LUMINOUS - MAKING ITS OWN LIGHT, NATURAL - The SUN is one example of a light source., ARTIFICIAL - A flashlight is one example of a light source, FIREFLY, JELLYFISH, FIREWORKS, NON-LUMINOUS - CANNOT BE SEEN IN THE DARK, LIGHT BULB, ANGLER FISH, GLOW WORM, NEON LIGHTS - EXAMPLE OF ARTIFICIAL LIGHT,

GRADE 2

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？