小檗碱对心血管系统的药理作用是（）
A.负性肌力作用
B.正性频率
C.升压
D.增加心肌耗氧量
E.抗心律失常
参考答案：E
–– _________?
–– He looks tall and fat.
A．What is he look
B．What does he look
C．How is he look
D．How does he look
羊背石
