電晶體三層構造中，哪一極的寬度最薄？ (A)都一樣寬 (B)E 極 (C)C 極 (D)B 極

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5. 電晶體三層構造中，哪一極的寬度最薄？
(A)都一樣寬
(B)E 極
(C)C 極
(D)B 極

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