答案:A
_____ trees we cut down, _____ animals can survive. [ ]
A. the more, the less
B. the less, the more
C. the more, the fewer
D. the fewer, the less
以下()参数是属于直放站的技术参数。
A.输出功率、增益、输入电平
B.带宽、带内波动和带外抑制
C.交调和杂散发射
D.噪声系数、电压驻波比
E.传输时延
F.波形质量