— Where is the art room?
— It's ____________ the second floor. [ ]
A. at
B. in
C. on
答案:C
以下哪些是引起围手术期凝血功能障碍的因素()
A.术中羊水栓塞
B.快速输血超过血容量80%
C.反复多次应用肌肉松弛药
D.输注大量血浆代用品
E.吸入氟烷