单项选择题
A.KEYLOCK B.REPEATER C.STATIC INVERTER D.ANTI-CLUTTER-SEA
（）20 targets can be tracked at one time．When maximum tr...
单项选择题（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
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
