对于感觉神经，可产生镇痛和镇静中枢的频率是 ( )A．100Hz左右B．50HzC．20～30HzD．200HzE．1～10Hz

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问题对于感觉神经，可产生镇痛和镇静中枢的频率是 ( )

选项 A．100Hz左右 B．50Hz C．20～30Hz D．200Hz E．1～10Hz

答案 A

解析

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