医疗器械接触与皮肤接触部位压疮容易发生在（）
A.护颈圈
B.吸氧导管
C.夹板
D.支架
E.足跟
F.骨隆突部位
参考答案：A, B, C, D
"The interest ____ be divided into five parts, according to the agreement made by both sides," declared the judge.
A．may
B．should
C．must
D．shall
非无菌原料药的生产暴露环境不低于
A．100级洁净区B．10000级洁净区C．10万级洁净区D．30万级洁净区E．1万级背景下局部100级区
