下肢静脉曲张形成的主要病因是 A. 腹腔内负压改变 B. 心功能不全 C. 下肢运动过多 D. 静脉瓣膜功能不全
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【简答题】阅读理解。 Look at the girl. Her name is Li Fang. She is eleven. My name is Kate. I am eleven, too. Li Fang and I are good friends. She is in Class One, Grade One. She is Number 8 in Row 5. I am in Class T...
【简答题】阅读理解。 Look at the girl, she is eleven. Her name is Wang Fang. I am eleven, too. My name is Kate. Wang Fang and I are good friends. She is in Class One, Grade One. She is Number 8 in Row 5. I am in Cla...