单项选择题
A.As many as B.So many as C.As much as D.As more as
What will NOT induce errors into a doppler sonar log?（）...
单项选择题What will NOT induce errors into a doppler sonar log?（）
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
