急性腹膜炎留置腹腔引流管的目的是()。
A.支撑作用
B.促进手术野死腔缩小或闭合
C.排出腹腔坏死组织
D.排出腹腔脓液
E.引流腹腔内积气
参考答案:B, C, D
-We all had a lot of fun at the barbecue yesterday. Pity you weren't there.
-I really should have gone with you but I ________ on some important problems.[ ]
A.worked
B.was working
C.would work
D.would have worked
脂润滑的设备,当转速大于3000转/分钟时,加脂量为轴承箱容积的()。
A、1/3
B、1/2
C、1/4
D、2/3