诊断恶性肿瘤最重要的依据是（）。

A.病程短、发展快

B.肿块质硬、固定

C.血清酶学及免疫学检查

D.X线、放射性核素或超声波检查

E.组织病理学检查

Charlotte’s works are famous for the depiction of the life of () working women, particularly governesses.

A. the middle-class

B. the lower-class

C. the upper-middle-class

D. the upper-class