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【单选题】
A class D amplifier ( ).A.
conducts through 180° of the input waveform
B.
conducts between 180° and 360° degrees of the input waveform, depending on the amount of dc bias
C.
conducts through less than 180° of the input waveform
D.
works only with digital and pulsed waveforms
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B.
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D.
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【单选题】Why did Ms. Nix write the email?
A.
To alert team members to an approaching policy change
B.
To deliver instructions for handling displeased customers
C.
To instruct workers on how to provide technical support
D.
To show appreciation for the effort her team has made
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【单选题】狭义上来看,资本结构是指?()
A.
企业全部的资本构成及其比例的关系
B.
企业部分的资本构成及其比例的关系
C.
短期债务资本和权益资本各占多大比例
D.
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