已知文法G[Z]，其产生规则P为： Z→Be|AB|ZC A→Ae|e B →Ce|Af C→Cf D→f，其压缩过文法为： A: Z→Be|AB A∷=Ae|e B∷=Af B: Z→Be|AB A∷=Ae|e B →Ce|Af C: Z→Be|AB A∷=Ae|e D: Z→Be|AB|ZC Z→Be|AB A∷=Ae|e B →Ce|Af
已知文法G[Z]，其产生规则P为： Z→Be|AB|ZC A→Ae|e B →Ce|Af C→Cf D→f，其压缩过文法为： A: Z→Be|AB A∷=Ae|e B∷=Af B: Z→Be|AB A∷=Ae|e B →Ce|Af C: Z→Be|AB A∷=Ae|e D: Z→Be|AB|ZC Z→Be|AB A∷=Ae|e B →Ce|Af
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某电压串联负反馈放大电路，开环增益A=104，反馈系数F=0.001则闭环增益AF≈909。
某电压串联负反馈放大电路，开环增益A=104，反馈系数F=0.001则闭环增益AF≈909。
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刑法属于实体法，刑事诉讼法属于程序法。（ ）data:image/png;bas...OU26AAAAAElFTkSuQmCC
刑法属于实体法，刑事诉讼法属于程序法。（ ）data:image/png;bas...OU26AAAAAElFTkSuQmCC
image组件不支持（）图片格式。 A: JPG B: PNG C: SVG D: BMP
image组件不支持（）图片格式。 A: JPG B: PNG C: SVG D: BMP