航海英語緊急用語單項(xiàng)選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.

2 The use of the danger signal（）.

3 To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.

4 The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

5 The urgency signal concerning the illness of persons on board ship is（）.