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單項選擇題

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

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單項選擇題
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
單項選擇題
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

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