发光二极管 LED (Light Emitting Diode)的工作条件是反向偏置。

LED的中文全称为发光二极管，是英文Light Emitting Diode的缩写。

Which of the following type of lamp is used for heating a fuser？（） A: Xenon B: Halogen C: Incandescent D: Light Emitting Diode

LED（Light Emitting Diode，发光二极管）是一种能够将电能转化为可见光的固态的半导体器件

LED（Light Emitting Diode），发光二极管，是一种固态的半导体器件，它可以直接把电能转化为光能。

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.

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

汇款方式的基本当事人有（ ）。 A: emitte B: payee C: emitting bank D: paying bank

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.