高考问答
all英r18漫画:Which is false?
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高考问答
时间:2024/05/15 04:20:12
1.动脉壁的肌肉较静脉壁的厚
2.动脉内的血压较静脉内的高
3.所有的动脉都有瓣膜
4.血液沿动脉离开心脏
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