航海英語海上氣象報告與氣象導(dǎo)航單項選擇題每日一練(2019.01.22)

來源：考試資料網(wǎng)

1 The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.

2 What benefit is a weather bulletin to a mariner（）.

3 When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear（）.

4 An air mass is termed warm if（）.

5 The Beaufort scale is used to estimate the（）.