女性,26岁,胸痛,查体心前区可触到心包摩擦感。该患者诊断可能是()
A.胸膜炎
B.二尖瓣狭窄
C.主动脉瓣狭窄
D.大量心包积液
E.心包炎
参考答案:E
与操作过程规范(OPSpecs)图有关的指()
A.不精密度
B.不准确度
C.质量要求
D.质控方法
E.总误差
I____ asleep because it took me a long time to realize that the telephone was ringing.
A.could have fallen
B.should have fallen
C.must have fallen
D.mustn’t have fallen