As the busiest woman in Norton, she made _______ her duty to look after all the other people’s affairs in that town.

A．this

B．that

C．one

D．it

血红蛋白病的确诊试验是（）

A.血红蛋白电泳

B.红细胞形态检查

C.自身溶血试验

D.Coombs试验

E.蔗糖溶血试验