题目内容
下列各项生理活动中,属于条件反射的是
2021-12-07
A.呼吸道黏膜受分泌物或异物刺激而引起咳嗽
B.异物轻触眼角膜而引起眨眼动作
C.闻到食物香味而引起唾液分泌
D.肢体受到伤害性刺激时产生疼痛而缩回
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