题目内容
(请给出正确答案)
[单选题]
Which of the following frequency planning methods must use the radio frequency hopping
A.4*3
B.7*3
C.1*3
D.MRP
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A.4*3
B.7*3
C.1*3
D.MRP
A.That same day.
B.Friday of that week.
C.Saturday of that week.
D.Tuesday of the following week.
A.in which
B.in that
C.at which
D.on which
A.who is
B.who are
C.which are
D.which is
【C16】
A.in which
B.from which
C.of which
D.by which
Which of the following processes will increase salinity of ocean waters?
A.Evaporation.
B.Precipitation.
C.Melting.
D.Dilution.
A.that
B.which
C.what
D.by which
The work "Their" in line 20 refers to which of the following?
A.Elements
B.Monitors
C.Customs
D.Practice