—Is this your pencil ?           

—No, ______ is here. I think it’s Yang Hua’s.                

A．I

B．mine

C．my

D．me

最易透过胎盘的药物是()

A．硫喷妥钠

B．丙泊酚

C．氯胺酮

D．维库溴铵

E．地西泮