VHF发射机面板指示VSWR过高，系统可能故障是（）。
A.调制器
B.RF功放
C.收发转换继电器
D.射频电缆
参考答案：B, C, D
I felt it hard to keep up with my classmates. But whenever I want to _______, my teacher always encourages me to work harder.[ ]
A. go on
B. give up
C. run away
D. give back
监理实施与监理组织设计都应遵循( )原则。
A．公正、独立、自主
B．权责一致
C．分工与协作统一
D．综合效益
