易引起阿-斯综合征发作的心律失常是()
A.心房颤动
B.三度房室传导阻滞
C.左前分支传导阻滞
D.阵发性室上性心动过速
E.二度Ⅰ型房室传导阻滞
参考答案:B
It is difficult to________one twin from the other.They almost don't________from each other.[ ]
A. differ; distinguish
B. distinguish; different
C. distinguish; differ
D. tell; different
按整车运输的成件货物规格不同,一批数量超过1500件,只按重量承运,不计算件数。()