Mechanical lifting of air by the upslope slant of the terrain is called（）.

单项选择题It is predicted that heavy rains are（）to flood the harbor and its vicinity in a few days.

A.frightening
B.threatening
C.scattering
D.warning

单项选择题INTERTROPICAL CONVERGENCE ZONE OVER SOUTH PHILIPPINE PASSING OVER MINDANAO NORTHERN SULU AND PALAWAN.This paragraph is likely to be under the heading of（）.

A.GALE WARNING
B.24 HOURS FORECAST
C.SYNOPSIS
D.STORM WARNING

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

A.Moderate gale
B.Near gale
C.Strong gale
D.Whole gale

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