For dBm, dB, dBi, the following description is correct (Select 3 Answers).

For dBm, dB, dBi, the following description is correct (Select 3 Answers).
A . dBm: characterizes the absolute value of power
B . dBi and dBd: characterize the relative value of the gain
C . dB: Characterizing the relative value of power
D . If the antenna is 12dBi and the antenna is 14dBi, it can be said that A is smaller than 2

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Answer: A B C