为了预防直流电电流过大而引起的电灼伤，一般成人的电流密度应是

A.0.05～0.1mA/cm²

B.0.1～0.25mA/cm²

C.0.25～0.5mA/cm²

D.0.5～0.75mA/cm²

E.0.75～1.0mA/cm²