--- Did Mary attend the meeting on time yesterday?

--- No,she ______late as usual ,which made the boss very angry.

A．turned up

B．turned down

C．turned off

D．turned out

监测他克莫司的血液浓度最好宜采用何标本

A．红细胞

B．血浆

C．血小板

D．全血

E．血清