单选:动物们在活动时常常忘不了竖起耳朵,并且还不时地转动着方向,这是因为().A.向其它动物示威B.判断声源C.动物的一种习惯动作D.赶小虫

题目内容:
动物们在活动时常常忘不了竖起耳朵,并且还不时地转动着方向,这是因为().
A.向其它动物示威
B.判断声源
C.动物的一种习惯动作
D.赶小虫
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