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單項(xiàng)選擇題

（）is on the panel of radar.

A.KEYLOCK
B.REPEATER
C.STATIC INVERTER
D.ANTI-CLUTTER-SEA

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單項(xiàng)選擇題

（）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

單項(xiàng)選擇題

What will NOT induce errors into a doppler sonar log?（）

A.Increased draft
B.Pitch
C.Roll
D.Change in trim

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