单项选择题

A.2U应完全溶血,lU全溶或微不溶,0.5U应不溶血
B.2U应不溶血,1U全溶或微不溶,0.5U应完全溶血
C.2U应完全溶血,lU应不溶血,0.5U全溶或微不溶
D.2U应全溶或微不溶,1U完全溶血,0.5U应不溶血
E.2U应不溶血,1U完全溶血,0.5U应全溶或微不溶