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举一反三
【单选题】依据气团的概念分析，下列条件有利于气团形成的是
A.
地面开阔、平坦，大气相对稳定
B.
大面积的海域，空气对流运动显著
C.
地面崎岖，空气受外界影响较大
D.
大面积的海域，有寒暖流交汇
【单选题】Sleepless at Night It was a normal summer night Humidity(湿气) hung in the thick air. I couldn’t go to sleep, partly because of my cold and partly because of my expectations for the next day. My mum had...
A.
it was too cold
B.
it was too dry
C.
he had a cold
D.
he had a fever.
【单选题】形成地形雨、锋面雨和对流雨都需要具备的三个条件是：①空气中有足够水汽②空气中有足够凝结核③空气中的水平运动④空气的上升运动
A.
①②③
B.
①②④
C.
①③④
D.
②③④