采用蛋白酶消化的目的是暴露抗原，增加细胞和组织的通透性，以利抗体与抗原最大限度地结合。()
参考答案：对
He slipped and broke his leg. _____, he’ll have to be away from school for two or three months.[ ]
A. As a result
B. On the other hand
C. Above all
D. However
MRI扫描，出现包膜征最常见于（）。
A.炎性假瘤
B.转移性肝癌
C.肝腺瘤
D.原发性肝癌
E.血管瘤
