肥厚性心肌病的表现有()
A．劳力性呼吸困难
B．收缩期杂音
C．心前区疼痛
D．晕厥
E．奇脉
参考答案：A, B, C, D
—Are _____ their books?
—Yes, _____ are.[ ]
A. these; their
B. those; their
C. this; they
D. those; they
下述哪项属室上性心动过速的特点（）
A.逆行P波
B.3个室早连续出现
C.房室分离
D.心室夺获
E.f波
