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[单选题]A.-2/3B.2/3C.-3/2D.3/2
[单选题]A.-2/3B.2/3C.-3/2D.3/2
[单选题]A.-2/3B.2/3C.-3/2D.3/2
[单选题]A.-2/3B.2/3C.-3/2D.3/2
[单选题]A.再生障碍性贫血B.缺铁性贫血C.巨幼细胞贫血D.B-型地中海贫血
[单选题]A.再生障碍性贫血B.缺铁性贫血C.巨幼细胞贫血D.B-型地中海贫血
[单选题]A.收缩降低B.舒张减慢C.收缩增强D.舒张增快E.传导增快