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11.( )唱KTV時,我們的聲音會經過麥克風、擴大機、喇叭的作用,最後傳出很大的音量。試問「聲音訊號」變為「電流訊號」是發生在哪一設備中? (A)麥克風 (B)擴大機 (C)喇叭
問題詳情
11.( )唱KTV時,我們的聲音會經過麥克風、擴大機、喇叭的作用,最後傳出很大的音量。試問「聲音訊號」變為「電流訊號」是發生在哪一設備中?
(A)麥克風
(B)擴大機
(C)喇叭
參考答案
答案:A
難度:
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10.( )電晶體的運作模式,是在哪一接腳提供適當的電流後,即可讓另兩支接腳間導通,因此可作為開關使用? (A)基極(B) (B)射極(E) (C)集極(C)
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12.( )唱KTV時,我們的聲音會經過麥克風、擴大機、喇叭的作用,最後傳出很大的音量。試問「電流訊號」變為「聲音訊號」是發生在哪一設備中? (A)麥克風 (B)擴大機 (C)喇叭
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13.( )唱KTV時,我們的聲音會經過麥克風、擴大機、喇叭的作用,最後傳出很大的音量。試問其中「擴大機」的功能為何? (A)將「聲音訊號」轉變為「電流訊號」 (B)將「電流訊號」轉變為「聲音訊號」
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