When the wind speed decreases to less than 30 knots, you can open the cargo door.

单选题

When the wind speed decreases to less than 30 knots, you can open the cargo door.

答案解析

单选题

The apparent wind can be zero when the true wind is from ___ .A. ahead and equal to the ship‘s speedB. astern and equal to the ship‘s speedC. ahead and equal to twice the ship‘s speedD. astern and equal to twice the ship‘s speed

答案解析

单选题

_______ is defined as the actual speed of the airplane over the ground. It is true speed adjusted for wind.

答案解析

单选题

Which of the following descriptions on Cold High is incorrect?A. Wind speed near the centre is the highest in the whole cold high area.B. The movement of cold high is guided by the upper airstream.C. Radiation fog is easily formed when the centre is near to the coastal region.D. Temperature will decrease when cold high is passing.

答案解析

单选题

Jet stream region is an area where the wind speed is greater than _________ m/s.

答案解析