变异型心绞痛使用()
A.β受体阻滞剂
B.钙拮抗剂
C.硝酸酯类
D.多巴胺
E.ACEI
参考答案:B
-- Mr. Brown, National Day is coming…
--- ______? Just occupy yourself in your study.
A.So what
B.What if
C.How come
D.What for
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