99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<acronym id="vcvhk"></acronym>

單項選擇題

PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）.

A.Distress
B.Safety
C.All clear
D.Urgency

你可能感興趣的試題

單項選擇題

Is extra power available（）emergency while maneuvering?

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

單項選擇題

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

<kbd id="qa7kg"><i id="qa7kg"><sup id="qa7kg"></sup></i></kbd>

<track id="qa7kg"><address id="qa7kg"><pre id="qa7kg"></pre></address></track>

<nav id="qa7kg"><address id="qa7kg"></address></nav><optgroup id="qa7kg"><i id="qa7kg"><thead id="qa7kg"></thead></i></optgroup>