The conversation mode between two stations in NBDP service is __()
A.ARQ
B.SFEC
C.CFEC
D.EGC
A、ARQ
A.ARQ
B.SFEC
C.CFEC
D.EGC
A、ARQ
A.x Mod 2=1 Or y Mod 2=1
B.x Mod 2=0 Or y Mod 2=0
C.x Mod 2=1 And y Mod 2=1
D.x Mod 2=0 And y Mod 2=0
A.=IF(OR(AND(MOD(A1,4)=0,MOD(A1,100)0),MOD(A1,400)=0),"闰年","平年")
B.=IF(AND(AND(MOD(A1,4)=0,MOD(A1,100)0),MOD(A1,400)=0),"闰年","平年")
C.=IF(OR(OR(MOD(A1,4)=0,MOD(A1,100)0),MOD(A1,400)=0),"闰年","平年")
D.=IF(AND (OR (MOD(A1,4)=0,MOD(A1,100)0),MOD(A1,400)=0),"闰年","平年")
A.PCI mod 3错开
B.PCI mod 4错开
C.PCI mod 6错开
D.PCI mod 8错开
A.n\23=0 Or n\37=0
B.n Mod 23=0 And n Mod 37=0
C.n Mod 23=0 Or n Mod 37=0
D.n\23=0 And n\37=0