草履虫的运动主要靠( )
A.附肢游泳
B.纤毛摆动
C.身体蠕动
D.伪足变形
答案:B
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A.If, which
B.So long as, what
C.In case, where
D.Even if, as
酒精性肝硬化的病理机制是()
A.引起肝门静脉扩张
B.直接损伤肝细胞
C.干扰酶的合成
D.收缩肝内血管
E.阻碍胆汁分泌