单项选择题
A.35/38dBm B.38/41dBm C.40/43dBm D.43/45dBm
A.dBm B.dB C.dBC D.dBd
A.1dBi=1dBd B.1dBi=(1+2.15)dBd C.1dBd=(1+2.15)dBi D.无法换算
A.2 B.3 C.4 D.5
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