软交换核心网络采用何种系统架构？（）
A.承载与控制相分离的架构
B.基于TDM承载的软交换架构
C.承载与业务相分离的软交换架构
参考答案：A
药物使用过程中伴随发生的并非期望的有益或无益的治疗效果为
A．OQB．PQC．PV D．IQE．SIP
Such poets as Shakespeare _____ widely read, of whose works, however, some _____ difficult to understand.
[ ]
A. are; are
B. is; is
C. are; is
D. is; are
