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安吉尔壁挂式管线机:Which is false?
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中科新闻网
时间:2024/05/17 03:39:20
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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