Marine radars are used to measure _______ of ships to prevent collision with other ships,to navigate and to fix their position at sea where within range of shore.
【简答题】听材料,完成1~3小题。 1. What's the man doing? A. Having sports. B. Asking the time. C. Asking the way. 2. Where is the man going? A. To a post office. B. To a bookshop. C. To a cinema. 3. How will the man go ...