問題詳情
12. 江倪的玩具芭比娃娃須使用 4個 1.5 伏特的電池才能正常動作，電池接法如右圖所示，則該娃娃的正常工作電壓為多少伏特？ 
(A)1.5
(B)3.0
(C)4.5
(D)6.0
參考答案
無參考答案
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