答案:CDE
A. A、HandovertoGSMshouldbeperformed
B. B、HandovertoGSMshouldnotbeperformed
C. C、HandovertoGSMshallbeperformed
D. D、HandovertoGSMshallnotbeperformed
A. A、基于覆盖
B. B、基于负荷
C. C、基于业务
D. D、基于UE能力