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CDMA 系统中使用的多路复用技术是（1）。我国自行研制的移动通信3G 标准是（2）。
（2）A、时分多路
B、波分多路
C、码分多址
D、空分多址
（2）A、TD-SCDMA
B、WCDMA
C、CDMA2000
D、GPRS
Software entities are more complex for their size than perhaps any other humanconstruct, because no two parts are alike （at least above the statement level）. If they are, wemake the two similar parts into one, a（ 71 ）, open or closeD． In this respect software systemsdiffer profoundly from computers, buildings, or automobiles, where repeated elements abound．
Digital computers . are themselves more complex than most things people build;they have very large numbers of states This makes con
（）模式通过提供与对象相同的接口来控制对这个对象的访问。
A．适配器(Adapter)
B．代理(Proxy)
C．组合(Composite)
D．装饰器(Decorator)
把网络地址117.15.32.0/23划分为117.15.32.0/27，则得到的子网是（1）个。每个子网中可使用的主机地址是（2）个。
（1）A．4
B．8
C．16
D．32
（2）A．30
B．31
C．32
D．34