A.1/3 B.1/4 C.1/5 D.1/6
A.8km B.11.25km C.34km D.無(wú)限制
A.時(shí)域DCA/空域DCA B.時(shí)域DCA/碼域DCA/頻域DCA C.時(shí)域DCA/空域DCA/碼域DCA D.時(shí)域DCA/空域DCA/碼域DCA/頻域DCA