单项选择题
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
The radar component that generates the radio-frequency ...
单项选择题The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
A.magnetron B.receiver C.indicator D.modulator
