A.只對(duì)直流電反應(yīng)弱 B.只對(duì)感應(yīng)電反應(yīng)減弱 C.對(duì)直流電和感應(yīng)電的反應(yīng)均弱 D.對(duì)感應(yīng)電反應(yīng)弱,對(duì)直流電反應(yīng)消失 E.對(duì)直流電和感應(yīng)電的反應(yīng)均消失
A.選擇性B.快速性C.靈敏性D.以上均正確