A.The funnelB.The messroomC.The galleyD.The satellite a……

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

单项选择题In the Northern hemisphere northerly winds may cause temperature（）.

A.falling
B.rising
C.constant
D.same

单项选择题Which of the following is not a form of precipitation?（）

A.rain
B.frost
C.sleet
D.snow

单项选择题Waves formed by the wind blowing far away are known as（）.

A.sea
B.current
C.tide
D.swell

单项选择题If the moisture content of the cargo sample is（）the Transportable Moisture Limit,then the cargo should be safe to load.

A.above
B.below
C.equal to
D.uncertain