單項(xiàng)選擇題Keep clear()the buoy.

A.to
B.on
C.of
D.for


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1.單項(xiàng)選擇題Large vessel leaving.Keep clear()approach channel.

A.off
B.reach
C.from
D.of

2.單項(xiàng)選擇題Let’s submit the case()the cargo surveyor.

A.to
B.of
C.for
D.about

3.單項(xiàng)選擇題My gyro-compass error is().

A.east two degrees
B.two degrees east
C.two east degrees
D.two-degrees east

4.單項(xiàng)選擇題My position has been obtained by().

A.astronomical observation
B.hydrographic survey
C.weather prediction
D.current sailing

5.單項(xiàng)選擇題My propeller was hit by a steel barge lying().

A.ahead
B.astern
C.alongside my port bow
D.alongside my starboard bow