冠心病病人术前治疗的常用药物有哪些（）
A.硝酸甘油
B.心得安
C.钙通道阻滞剂
D.阿司匹林
E.多巴酚丁胺
参考答案：A, B, C, D
治疗上消化道出血脾不统血证，应首选（）。
A.泻心汤合十灰散加减
B.龙胆泻肝汤加减
C.归脾汤加减
D.独参汤加减
E.四味回阳饮加减
— Neither Danny nor Brian _____ at schoo1. What's the matter with them?
— I don't know. Let's phone them. [ ]
A. is
B. isn't
C. are
D. aren't
