压疮是（）
A.缺血性溃疡
B.缺氧性溃疡
C.压力性溃疡
D.营养不良性溃疡
E.维生素缺乏性溃疡
参考答案：C
– Could you tell me where I can get a dictionary?
– Take the escalator. The bookstore is on the ________ floor of the 5-floor building.
A. first B. third C. ninth
( )是详细工程设计过程的最后一道工序，是保证设计成品质量的又一重要质量活动。
A．会签
B．验收
C．决算
D．清场
