单项选择题
A.10-20minB.20-30minC.30-40minD.40-50minE.50-60min
A.10HzB.20HzC.50HzD.30HzE.40Hz
A.< 0.05TB.< 0.02TC.>0.2TD.0.1-0.2TE.0.05-0.1T
A.经皮神经电刺激B.中频电刺激C.磁疗D.压力疗法E.超声波
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