13. What technology allows you to make telephone calls using a broadband Internet connection instead of regular (or analog)phone line?
(A)VoIP
(B)VOD
(C)GSM
(D)WLAN

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統計： A(170), B(4), C(13), D(30), E(0) #404460

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網際網路協定通話技術（英語：Voice ...
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