A: That was a delicious meal, Mrs. Barr. Thank you very much. B:______
A.You're welcome.
B.Never mind.
C.It doesn't matter.
D.It's just OK.
第6题
TD-LTE系统中,RLC层AM实体实现了ARQ的功能,保证了相应业务和信令的可靠性传输。()
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