A.0 B.220 C.230 D.110
A.2KV B.764V C.450V D.311V
A.各級放大倍數(shù)之和 B.各級放大電路中的最大放大倍數(shù) C.各級放大倍數(shù)之積 D.各級放大電路的平均放大倍數(shù)與級數(shù)之積