單項(xiàng)選擇題Is extra power available()emergency while maneuvering?

A.for
B.in
C.during
D.to


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1.單項(xiàng)選擇題A man aboard a vessel,signaling by raising and lowering his outstretched arms to each side,is indicating().

A.danger,stay away
B.all is clear,it is safe to pass
C.the vessel is anchored
D.a distress signal

2.單項(xiàng)選擇題You are()danger.

A.run in
B.running into
C.run into
D.running in