单项选择题
A.0.01~100HzB.0.01~1000HzC.0.05~100HzD.0.05~1000Hz
A.0.01~100HzB.0.01~1000HzC.100~500HzD.100~1000Hz
A.接地环路B.饱和或截止失真C.频率失真D.导联线开路
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