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單項(xiàng)選擇題

To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.

A.the actual depth
B.added to or subtracted from the charted depth
C.multiplied by the charted depth
D.divided by the charted depth

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單項(xiàng)選擇題

To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.

A.0 degrees
B.10 degrees
C.20 degrees
D.30 degrees

單項(xiàng)選擇題

There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.

A.shown
B.expressed
C.appeared
D.displayed

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