ICU医院感染的危险因素有()
A.机体免疫力低下
B.介入性诊疗操作
C.血制品污染
D.医用器材被污染
E.ICU常驻细菌大多为耐药菌株
参考答案:A, B, C, D, E
The reason _____ he gave for his absence is _____ he was drunken.
A.why; that
B.because; that
C.that; because
D.that; that
亚硫酸盐未漂白针叶木浆(非溶解级) ( )
A.10
B.12
C.16
D.17