普萘洛尔治疗心绞痛的主要药理作用是
A.抑制心肌收缩力,减慢心率B.扩张冠脉C.减低心脏前负荷D.降低左室壁张力E.以上都不是
参考答案:A
—What do you think of the furniture on sale?
—Pretty good. But ____________ what you bought with the samples, I don’t think it is __________ the money.
A.comparing; worth
B.compared; worthwhile
C.compare; worthy
D.comparing; value
患者,女,4岁,前牙反,家族无类似畸形。有咬上唇习惯。上前牙略舌倾,下前牙直立,可退至切
治疗结束后保持()
A.Hawley式保持器
B.功能矫治保持
C.固定保持
D.不需戴保持器
E.以上都不是