1) natural sources of light a) b) c) d) 2) man-made light resources  a) b) c) d) e) 3) transparent objects a) b) c) d) 4) translucent objects a) b) c) d) 5) opaque objects a) b) c) d) 6) transparent objects may .............................? a) allow light to pass through it   b) block some of the light and allow some of the light to pass through it  c) not allow light to pass through  7) translucent objects may .....................................? a) allow light to pass through it b) block some of the light and allow some of the light to pass through it c) not allow light to pass through 8) opaque objects may ........................? a) allow light to pass through it b) block some of the light and allow some of the light to pass through it c) not allow light to pass through

light

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？