MFDSC控制SSB发射机进行遇险报警呼叫发射时的载波频率是（）kHz

LC正弦波振荡电路的振荡频率较高，所以放大电路多采用分立元件电路。A．对 B．错

单项选择题LC正弦波振荡电路的振荡频率较高，所以放大电路多采用分立元件电路。

在MF/HF设备进行无线电话遇险通信时，前面冠以“Mayday”，其目的是（）

未知题型在MF/HF设备进行无线电话遇险通信时，前面冠以“Mayday”，其目的是（）

Which of the following can be categorized into the grou...

单项选择题 Which of the following can be categorized into the group of medium priority?
A.Which of the following can be categorized into the group of medium priority?
B.Writing a paper on the problem of air pollution that is due tomorrow.
C.Preparing for a job interview that is there weeks away
D.Preparing for a mid-term that is only three days away.