Adding 5 people to a 4 person team increases the communication channels by a factor of:
A 2 times
B 3 times
C 4 times
D 5 times
E 6 times
第1题:
Anetworktechnicianisinstallingaseriesofthreeaccesspointstocovertheentirewingofabuilding.Eachaccesspointhasawiredconnectionand802.11gisbeingusedforthewirelesstransmission.Whichofthefollowingchannelsshouldbeusedfortheaccesspoints?()
A.Channels1-6-11
B.Channels1-3-5
C.Channels7-11-1
D.Channels2-4-6
第2题:
关系模式R(A1,A2,A3,A4,A5),如果(A1,A2)→A3,(A3,A4)→A5, 则R的候选键为_________。
A.(A1,A2);
B.(A1,A2,A5);
C.(A1,A2,A4);
D.(A1,A2,A3,A4);
E.(A1, A2, A4, A5)。
第3题:
5、关系模式R(A1,A2,A3,A4,A5),如果(A1,A2)→A3,(A3,A4)→A5,则R的候选键为________。
A.(A1,A2,A5)
B.(A1,A2)
C.(A1,A2,A4)
D.(A1,A2,A3,A4)
第4题:
2、类Person中定义的静态方法Fun(),正确调用该方法的语法格式是()
A.People实例对象.Fun()
B.Fun()
C.People.Fun()
D.以上都不对
第5题:
5、关系模式R(A1,A2,A3,A4,A5),如果(A1,A2)→A3,(A3,A4)→A5, 则R的候选键为_________。
A.(A1,A2);
B.(A1,A2,A5);
C.(A1,A2,A4);
D.(A1,A2,A3,A4);
E.(A1, A2, A4, A5)。