Which of the following frequency planning methods must use the radio frequency hopping
A.4*3
B.7*3
C.1*3
D.MRP
A.4*3
B.7*3
C.1*3
D.MRP
第1题
A.That same day.
B.Friday of that week.
C.Saturday of that week.
D.Tuesday of the following week.
第3题
A.in which
B.in that
C.at which
D.on which
第5题
A.who is
B.who are
C.which are
D.which is
第7题
【C16】
A.in which
B.from which
C.of which
D.by which
第8题
Which of the following processes will increase salinity of ocean waters?
A.Evaporation.
B.Precipitation.
C.Melting.
D.Dilution.
第9题
A.that
B.which
C.what
D.by which
第10题
The work "Their" in line 20 refers to which of the following?
A.Elements
B.Monitors
C.Customs
D.Practice