25岁的新型隐球菌脑膜炎患者,体重50kg,每天所用两性霉素B的量最多不要超过()
A.25mg
B.50mg
C.100mg
D.75mg
E.125mg
参考答案:B
专业监理工程师在项目监理机构中所属的职能层次是______。
A.决策层
B.执行层
C.操作层
D.核心层
Why not ________ for help when you were in trouble?
A.you ask
B.ask
C.asking
D.to ask