根据学校的相关规定，学生擅自离校4-7天，给予（）处分。
A.警告
B.严重警告
C.记过
D.留校察看
参考答案：B
I was wearing a seatbelt. If I hadn’t been wearing one, I （）.
A. were injured
B. would be injured
C. had been injured
D. would have been injured
心房颤动可发生
A．奇脉B．短绌脉C．交替脉D．水冲脉
