The frequency 156.525MHZ and 156.8MHZ should be used in the band of（）.
The frequency of an alternator is controlled from the main switchboard by adjusting the（）
Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）
When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
CDMA手机的工作频段：接受及发射分别是（）。①890~915MHz；②935~950MHz；③869~894MHz；④824~849MHz
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）
To increase the frequency of an operating AC generator, you should （）
The（）doesn't cover household items.
The frequency of an AC generator is adjusted by means of the （）
What is the frequency of the front side bus （FSB） on the eX4 architecture？（）
When it is accepted to remain on the frequency indicated，you should say（）.
The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）
The frequency output of an operating alternator is controlled by the （）.
The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.
Which manipulation is the fastest manipulation of frequency?
The author doesn't know how to protect the river.
Why doesn’t the man often go to the cinema
The highest frequency of a signal is ,sampling angular frequency is , , in order to avoid aliasing when sampling this signal, what pre-processing is required before sampling （）
The servant doesn't know what the message is about.
“1*3” reuse, radio frequency hopping and 50% load will result in the following gain:（
Who doesn't know the name of the object？
Which logical channel must be dimensioned for each cell when considering the frequency
