急性心肌梗死早期，特别是入院前主要的死因最多见（）
A.传导阻滞
B.室早
C.室颤
D.房早
E.房颤
参考答案：C
—I didn't go to class last night because my car broke down.
—You mine. I wasn't using it.[ ]
A. should borrow
B. might have borrowed
C. could have borrowed
D. must have borrowed
事故形成的四个条件是什么？
