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單項(xiàng)選擇題

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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單項(xiàng)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

單項(xiàng)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

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