In Beaufort Scale，the wind force 7 with speed of 28-33 knots is defined as（）.

单项选择题If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position，what winds can you expect in the Northern Hemisphere?（）.

A.East to northeast
B.East to southeast
C.North to northwest
D.South to southeast

单项选择题If the sky was clear，with the exception of a few cumulus clouds，it would indicate（）.

A.rain
B.hurricane weather
C.fair weather
D.fog setting in

单项选择题If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you，what winds can you expect in the Southern Hemisphere?（）.

A.South-southwesterly
B.North-northwesterly
C.South-southeasterly
D.North-northeasterly

单项选择题HIGH WAVES；DENSE STREAKS OF FOAM ALONG THE DIRECTION OF THE WIND；CRESTS OF WAVES BEGIN TO TOPPLE，TUMBLE AND ROLL OVER；SPRAY MAY AFFECT VISIBILITY.This condition is likely to be termed（）.

A.strong breeze
B.near gale
C.gale
D.strong gale

单项选择题Gale warnings are usually issued when winds of（）8-9 are expected．

A.wind Speed
B.Air Force
C.wind Velocity
D.Beaufort Force