单项选择题
A.The funnel B.The messroom C.The galley D.The satellite antenna
When the wave period and the apparent rolling period ar...
单项选择题When the wave period and the apparent rolling period are the same（）.
A.synchronous rolling occurs B.roll period decreases C.roll period increases D.roll amplitude is dampened
In the Northern hemisphere northerly winds may cause te...
单项选择题In the Northern hemisphere northerly winds may cause temperature（）.
A.falling B.rising C.constant D.same
Which of the following is not a form of precipitation?（...
单项选择题Which of the following is not a form of precipitation?（）
A.rain B.frost C.sleet D.snow
