性心肌梗死发生室速时使用（）
A.β受体阻滞剂
B.钙拮抗剂
C.硝酸酯类
D.利多卡因
E.多巴胺
参考答案：D
That was the first time I _____ there and I was impressed by the friendly people very much. [ ]
A. go
B. was going
C. had gone
D. have gone
(二)
[背景资料]
安全教育培训应包括哪些主要内容
