Tom likes playing _____ basketball very much, but he doesn’t like ______ basketball I bought him yesterday.

A．/; the

B．the; the

C．the; a

D．the; /

胃溃疡节律性疼痛的特点是（）

A.餐后1／2～1小时出现疼痛

B.空腹痛

C.餐时痛

D.夜间痛

E.餐后3～4小时出现疼痛