人尿中含氮0.93%,如这些氮存在于尿素中,则人尿中含尿素[CO(NH2)2]为( )
A.0.2%
B.1%
C.2%
D.0.02%
答案:C
—That must have been a terrifying experience.
—Yeah. I _____ in the damaged car, unable to move.
A.was stuck
B.have been stuck
C.am stuck
D.had been stuck
不宜选用压力蒸气灭菌方法消毒的物品是()。
A.玻璃制品
B.金属器械
C.塑料制品
D.橡胶制品
E.棉布类制品