— Shall I open the window to let some fr

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问题选择题

— Shall I open the window to let some fresh air in?
— No, _____.

A. I'd rather not
B. I'd rather you not
C. I'd rather you didn't
D. I'd like not to

答案

答案：C

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判断题

xdB带宽指某频带的带宽，位于该频带上限频率和下限频率之外的任何连续频谱分量或离散功率频谱密度都至少比某给定0dB参考电平低xdB。