UNIT 4
Transistor
New words and Technical Terms amplify emitter transistor microprocessor silicon Prone to Vacuum tubes
Text A transistor is a device that is composed of semiconductor material [1]. [1].晶体管是一个由半导体材料组成器件。 本句是一个系表结构句子,包含有定语从句。 that is composed of semiconductor material用来修饰先行词device,that在从句中充当主语。 And it can amplify a signal or opens or closes a circuit, was invented in 1947 at Bell Labs.


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