单项选择题
The apparent wind can be zero when the true wind is from（）.
A.ahead and equal to the ship's speed
B.astern and equal to the ship's speed
C.ahead and equal to twice the ship's speed
D.astern and equal to twice the ship's speed
点击查看答案&解析
相关考题
-
单项选择题
Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.
A.spring，around late evening
B.spring，around early evening
C.fall，around early morning
D.fall，around midday -
单项选择题
Radiation fog（）.
A.always forms over water
B.is formed by a temperature inversion
C.is thinnest at the surface
D.dissipates during the evening -
单项选择题
On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.
A.prevailing westerlies
B.geostrophic winds
C.doldrums
D.horse latitudes
