单项选择题
A.Increased draft B.Pitch C.Roll D.Change in trim
The microsecond unit of time is used in radar applicati...
单项选择题The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.
A.one-millionth part of a second B.one-thousandth part of a second C.one-hundredth part of a second D.one-tenth part of a second
The minimum range at which a target can be detected is ...
单项选择题The minimum range at which a target can be detected is basically determined by which of the following?（）.
A.persistence B.pulse repetition rate C.pulse length D.rotation rate
The number of pulses of energy transmitted per second i...
单项选择题The number of pulses of energy transmitted per second is call the（）.
A.carrier frequency B.pulse repetition rate C.pulse length D.pulse repetition time
