GSM系统上行链路和下行链路之间的频率间隔(双工间隔)为()MHz,频率间隔为()kHz。这样,系统的双工载频数共为()个
参考答案:45、200、124
连词成句。
1. is big this farm a
.
2. at the lamb look
3. fruit is the very fresh
4. you what do see the in farm
?
5. Mike as an as is strong ox
6. I rabbits like
土壤物理性质