A 0dB
B 1dB
C 负无穷dB
D 正无穷dB
(2)填空题(1)[填空1]
(2)[填空2]
(3)[填空3]
(4)[填空4]
(5)[填空5]
(6)[填空6]
(7)[填空7]
(3)填空题(1)[填空1]
(2)[填空2]
(3)[填空3]
(4)[填空4]
(5)[填空5]
(6)[填空6]
(7)[填空7]
(8)[填空8]
(9)[填空9]
(10)[填空10]
(11)[填空11]
(12)[填空12]
(4)填空题(1)[填空1][填空2][填空3][填空4][填空5][填空6]
(2)[填空7][填空8][填空9][填空10][填空11][填空12]
(5)填空题答案:[填空1] [填空2]
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