A.visibilityB.windsC.seaD.fogMAINLY GOOD BECOMING MODER……

单项选择题Little or no change in the barometric reading over a twelve hour period indicates（）.

A.stormy weather is imminent
B.that present weather conditions will continue
C.a defect in the barometer
D.increasing wind strength

单项选择题In the relatively calm area near the hurricane center，the seas are（）.

A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned

单项选择题In the doldrums you will NOT have（）.

A.high relative humidity
B.frequent showers and thunderstorms
C.steep pressure gradients
D.frequent calms

单项选择题In the doldrums you can expect（）.

A.steady，constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity

单项选择题In reading a weather map，closely spaced pressure gradient lines would indicate（）.

A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain