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單項選擇題

In anchoring orders, up and down means（）.

A.the chain is not upright
B.the chain is tight
C.the chain is upright
D.the chain is slack

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單項選擇題

In anchoring orders, walk back the chain means（）.

A.pay away the chain
B.take in the chain
C.check up the chain
D.take a strain on the chain

單項選擇題

In reading a weather map, closely spaced pressure gradient lines would indicate（）.

A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain

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