航海英語進(jìn)港指南單項(xiàng)選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white? （）

2 The single letter G，sent by an icebreaker to an assisted vessel，means （）.

3 The transfer procedures for oil products are required to be posted （）.

4 Keep （） to that point,said the pilot．

5 Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）