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
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相关考题
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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 -
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 -
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
