题干
下图为模拟人体膈肌运动的示意图，叙述正确的是（ ）
A：图甲演示吸气，膈肌收缩
B：图乙演示吸气，膈肌舒张
C：图甲演示呼气，膈肌舒张
D：图乙演示呼气，膈肌收缩
答案(点此获取答案解析）
C
下图为模拟人体膈肌运动的示意图，叙述正确的是（ ）
A：图甲演示吸气，膈肌收缩
B：图乙演示吸气，膈肌舒张
C：图甲演示呼气，膈肌舒张
D：图乙演示呼气，膈肌收缩
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