单项选择题
Which expression has the different meaning from entry into force ? “entry into force” means is（）.
A.coming into effect B.moving to full effect C.being based on force D.coming into force
单项选择题 Radar bandwidth is normally（）to the range scale and the associated pulse length.
单项选择题 A rectangular area is described in degrees of latitude and longitude from the latitude and longitude of the southwest corner of（）.
单项选择题 Vessel in distress（）indicate their position by any method.
