Tell 1 property of light? , What are opaque objects? , What is refraction of light? , What is reflection of light? , What are translucent objects? , What is the difference between luminous objects and non-luminous object? , What is light? , What are the two sources of light? , What is the main natural source of light on earth? , How are shadows formed? , Examples of translucent objects? , Examples of transparant objects? , Examples of opaque objects? , Examples of non-luminous objects? , Examples of luminous objects? , Examples of artificial sources of light? , Examples of natural sources of light? .

Light

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

)
恢復自動保存: ?