Do you know anyone ________ knows about the history of Qing Dynasty?[ ]

A. who

B. which

C. /

D. whose

诊断急性血管内溶血最有意义的阳性结果是（）

A.黄疸

B.血红蛋白血症和血红蛋白尿

C.红细胞减少

D.尿胆原增加

E.红细胞渗透脆性试验阳性