MAINLY VARIABLE 3 to 4 VEERING NELY 5 TOMORROW MORNING．This forecast refers to（）in the designated area.

单项选择题MAINLY GOOD BECOMING MODERATE.This forecast probably refers to（）in a certain area.

A.visibility
B.winds
C.sea
D.fog

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