單項(xiàng)選擇題
A.4 B.8 C.32 D.128
A.2個(gè) B.3個(gè) C.4個(gè) D.5個(gè)
A.只有DX正確 B.只有RX正確 C.兩次接收都對(duì)但不等 D.兩次接收都對(duì)且相等
A.1個(gè)字符 B.2個(gè)字符 C.3個(gè)字符 D.4個(gè)字符
A.BBBBYYY B.BBBYYYY C.BYBYBYB D.BYYYYYB
A.XZYWSPA B.XYZWRQS C.PAXYZWS D.WSPAXYZ
A.calling&receive B.calling&send C.called&receive D.called
A.主臺(tái) B.信息發(fā)射臺(tái)或信息接收臺(tái) C.信息發(fā)射臺(tái) D.信息接收臺(tái)
A.NNNN B.KKKK C.BRK D.OVER