51. Which of the following capacitors has polarity？
(A) Ceramic capacitors
(B) Plastic film capacitors
(C) Electrolytic capacitors
(D) Polystyrene film capacitors

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統計： A(3), B(3), C(31), D(7), E(0) #2929628

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題目是問說下列哪個電容器具有極性 (...
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