although a given waveform may contain frequencies over a very broad range, as a practical matterany transmission system will be able to accommodate only a limited band of（ ）. （2010年上半年网络工程师上午真题解析）
although a given waveform may contain frequencies over a very broad range, as a practical matterany transmission system will be able to accommodate only a limited band of（ ）. （2010年半年网络工程师上午真题解析）
A、frequencies
B、connections
C、diagrams
D、resources
参考答案：A
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