交叉配血试验中"次侧"配血应加入（）

A . 受血者血清与供血者红细胞

B . 受血者红细胞与供血者血清

C . 受血者血清与供血者血清

D . 受血者红细胞与供血者红细胞

E . 供血者血清与供血者红细胞