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【单选题】
人体的感知电流为( )。
A.
交流约为1mA,直流约为5mA;
B.
交流约为10mA,直流约为50mA;
C.
交流约为50mA,直流约为100mA;
D.
交流约为10mA,直流约为10mA
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A.
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B.
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C.
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D.
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