A student had an average of 86 for three tests. If the student’s highest test score was 2a, what was the average of the student’s two lowest scores ？（）

A.129-2a

B.258-2a

C.129-a

D.258+2a

E.258-a

血管内溶血的主要实验室检查为（）

A.红细胞及血红蛋白下降

B.粪胆原排泄增高

C.血红蛋白尿及含铁血黄素尿阳性

D.网织红细胞数增高

E.骨髓中幼红细胞增生明显