The color of food is the color of ( ) after reflecting white light in nature. A: complementary light B: cold light C: infrared light D: UV-light

The eyes may be injured by A: Mechanical impact B: UV light C: Radiation D: Chemical

What kind of eye injury increased during the COVID-19 pandemic? A: Work-related eye injury B: UV germicidal light induced photokeratitis C: Sport-related eye injury D: Traffic-related eye injury

There are several descriptions about the relationship between Fill Light and light ratio, which one is correct? A: As Fill Light is brighter, the light ratio is smaller. B: As Fill Light is brighter, the light ratio is larger. C: There is no relationship between Fill Light and light ratio D: As Fill Light is darker, the light ratio is larger.

UV unique visitor,又称独立访客。根据定义时间的不同,可分为每小时UV ,每日UV 每周UV,每月UV等

This computer ______ as an iPad. A: almost as light was B: was almost as light C: was as light almost D: D. light as almost was

Light meter has many types. Which one is Independent light meter? A: reflected light meter B: pointer light meter C: Digital LCD Light Meter D: incident light meter

What does the woman think the light does? A: The light bounces off things. B: The light moves very fast. C: The light shines on things and light them up. D: The light moves from one thing to another.

UV和PV的数据关系通常是以下哪种？（） A: UV B: UV>PV C: UV=PV D: 大小关系不一定

Unity提供了那几种光源（ ） A: Area Light B: Point Light C: Spot Light D: Dierctional Light