、What is the difference between 1 milliwatt and 1 watt?()A、20dBB、30dBC、100dBD、10dBE、40dB
、What is the difference between 1 milliwatt and 1 watt?()
A、20dB
B、30dB
C、100dB
D、10dB
E、40dB
发布时间：2025-09-13 02:16:45
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答案：B.30dB
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