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

單項選擇題

If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm,you should().

A.start the fire pump
B.go to your man overboard station
C.go to your lifeboat station
D.stand by for collision

微信掃碼免費搜題