大青叶主产于（）
A.四川、江苏
B.广东、广西
C.河北、江苏
D.云南、黑龙江
E.江苏、西藏
参考答案：C
最能反映心肌收缩功能的指标是（）。
A.LVEDV
B.dp/dt
C.PAWP
D.LVPs
E.Aps
Which of the following is the most widely accepted theory about the beginning of drama().
A.Drama came from seasonal changes.
B.Drama originated from ritual.
C.Drama evolved from stories.
D.Drama came from natural forces.
