CDMA2000-1X系统使用了哪一种扩谱方式?()
A.DSSS
B.FHSS
C.THSS
D.FDSS
参考答案:A
In relation to the Vietnamese legal system, explain the meaning of the following terms:
(b) Civil law. (3 marks)
张从正私淑于下列哪一位医家()
A.张仲景
B.孙思邈
C.刘守真
D.马宗素
E.许叔微