若集合S={y|y=2x,x∈R},T={y|y=x2+1,x∈R},则S∩T=( ).
{y|y≥1}
The book which is ______ of being read a second time is ______ 15 dollars. [ ]
A. worthy ; worthy
B. worth ; worth
C. worthy ; worth
D. worthwhile ; worthy
十二指肠球部溃疡患者,三天来上腹痛加重,反复呕吐,为胃内容物及咖啡样物,共3次约500ml,无宿食,吐后疼痛缓解,最可能合并()
A.幽门梗阻
B.穿孔
C.上消化道出血
D.癌变
E.弥漫性腹膜炎