地表环境中各事象之间都是相互联系的,当某事象发生变化时就会给

地表环境中各事象之间都是相互联系的,当某事象发生变化时就会给其他事象带来影响,甚至发生一系列的变化。读图回答问题。

图中所示,中心事象(X)是指(   

       A.海平面的上升     B.城市数量增多     C.动物数量减少     D.冰雪覆盖扩大

答案

D

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