Correct: Light travels in straight lines., We can see through transparent materials., Mirror reflects the light in one direction., Paper is an opaque material, The human skin is considered as opaque, Incorrect: Light travels in zigzag lines., We can see through opaque materials., Wood reflects the light in one direction., Paper is a transparent material, The human skin is considered as transparent,

Light

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?