【判断题】分集技术是用来补偿衰落信道损耗的,它通常通过两个或更多的接收天线来实现
【简答题】完形填空 My son lives in a big city in France. People there are very busy. There are many supermarkets and 1 on the streets. It is very easy to go 2 . You can buy a lot of nice things there. My son works ...
【判断题】分集技术是用来补偿衰落信道损耗的,它通常通过两个或更多的接收天线来实现,可以分为宏观分集和微观分集两类。WCDMA使用的软切换也是一种宏分集技术。
【判断题】脂质体的表面用 PEG 修饰,可制成长循环脂质体。