I bought a dress for only 10 dollars in a sale; it was a real ______.[ ]

A. exchange

B. bargain

C. trade

D. business

癌灶局限于 * * 壁，双侧腹股沟浅淋巴结活检(+)。临床分期为

A．40岁，单侧囊性包块，直径4cm
B．28岁，双侧囊实性包块，直径8cm，活动
C．50岁，子宫后陷凹有不平、实性结节，有腹水
D．35岁，痛经，后陷凹有结节
E．30岁，原发不孕，低热，腹水，盗汗，消瘦