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多项选择题
影响人耳音高感受的客观因素包括
A、频率
B、声压
C、频谱
D、包络
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单项选择题
孙武是中国历史、也是世界历史上第一个有记载的将“用间”提到战略高度来认识,并成功运用于战争实践的伟大军事家,堪称世界军事情报学鼻祖。( )
A、正确
B、错误
单项选择题
Jaguar has full manufacturing costs of their S-type sedan of £22,803. They sell the S-type in the UK with a 20% margin for a price of £27,363. Today these cars are available in the US for
2.01/£. Jaguar has committed to keeping the US price at
2.15/£, and Jaguar has not hedged against currency changes, what is the percentage margin the company will realize given the new exchange rate?
A、20.0%
B、15.3%
C、12.2%
D、7.2%
单项选择题
利用线性相位FIR滤波器的对称(或反对称)性质,可以减少近一半数量的乘法器。
A、正确
B、错误
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