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单选题
By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）
A
1/6
B
1/4
C
1/3
D
1/2
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考题
单选题By how much is a signal’s strength reduced when the signal passes through an object thatintroduces 3 dB of attenuation？（）A
1/6B
1/4C
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