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單項(xiàng)選擇題

On this chart only the principle （） to navigation are shown．

A.equipment's
B.tools
C.apparatus
D.aids

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單項(xiàng)選擇題

To agree with larger scale chart，latitudes taken from this chart should be increased （） about 8 seconds．

A.with
B.in
C.by
D.to

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