采用全血测定毒物时,采血时应加入一定量的抗凝剂。例如,采集1ml血,通常需加入草酸钠()
A.0.1mg
B.0.5mg
C.1.0mg
D.3.0mg
E.5.0mg
参考答案:C
监理工程师对工程项目三大目标的实现所起的作用是( )。
A.监控作用
B.保证作用
C.监控和保证作用
D.关键作用
----I hear that Tom was badly injured in a car accident and is in hospital now.
-----_________, let’s pay a visit to him.
A.If any
B.If so
C.When possible
D.When necessary