The writer prefers getting news online because _______________________.
A. she prefers reading summaries of the news to reading long articles
B. news and videos are in full colour
C. online newspapers have more sections
D. she can read different versions of the same story
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The writer is fascinated by the fact that __________________.
A. newspapers often have very different opinions of a news story's importance
B. serious newspapers rarely have stories about celebrities
C. downmarket newspapers have the same stories on the front page
D. newspapers always have the same front-page stories
The writer thinks that _____________________.
A. newspapers should only publish news online
B. daily newspapers may not survive
C. one day she will also stop getting a weekend newspaper
D. weekend papers will survive
电路的频率特性，是指对于不同频率的输入信号，其放大倍数的变化情况。高频时放大倍数下降，主要是因为 的影响；低频时放大倍数下降，主要是因为 的影响。
当输入信号频率为fl或fh时，放大倍数的幅值下降为中频时的 ，或者是下降了 dB。此时与中频时相比，放大倍数的附加相移约为 。
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