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單項(xiàng)選擇題

（）there danger of explosion?

A.Is
B.Has
C.If
D.Do

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單項(xiàng)選擇題

（）the whole the stowage is all right.

A.In
B.On
C.From
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單項(xiàng)選擇題

（）the time of collision，the 3rd officer was on the bridge．

A.At
B.On
C.Of
D.In

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