为非特异性梅毒血清试验的是()
A.TPI
B.RPR
C.TPHA
D.FTA-ABS
E.ELISA
参考答案:B
假如你是明代的一位应试者,你是怎样准备考试的?
___________________________________________________________________________
___ himself in carrying out an experiment, he can’t spare time to look after his children.
A.Occupied
B.Having occupied
C.Occupying
D.Having been occupied