PCU主要完成()等协议层次功能
A、RLC
B、MAC
C、BSSGP
D、NS
参考答案:A, B, C, D
He told us whether _________ a picnic was still under discussion
A.to have
B.having
C.have
D.had
下述哪项不包括在记忆过程中()
A.识记
B.遗忘
C.再认
D.保持
E.再现