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问题: ______

A: Theyrevealinafewminuteswhatotherwisewouldtakehourstodescribe.

B:successionofthreeorfourmapspresentsacontinuouspictureofweatherchanges.

C:xtensiveexperimentsarealsoinprogressforweathermodificationstudies.

D:Itisdifficulttointerpretaweathermap.

E:Theyarealsoabletodeterminewhetheranairmassisretainingitsoriginalcharacteristicsortakingonthoseofthesurfaceoverwhichitismoving.

F:onsiderableeffortisbeingexertedtodaytoachievemoreaccurateweatherpredictions.