A.阵发性绞痛
B.持续性锐痛
C.持续性疼痛伴阵发性加剧
D.持续性钝痛或胀痛

A.内侧
B.外侧
C.线上
D.以上都不对

A.社会保障领域
B.国家直接投资经营
C.国家宏观调控领域
D.市场障碍排除领域

A.has
B.has
C.has
D.climbed

A.undertake
B.underline
C.underlie
D.underestimate

A.lively
B.alive
C.live
D.alike

A.Hardly ever ；going
B.Hardly ever ；go
C.Hardly never；go
D.Hardly never ；going

A.I am thinking of taking up scuba diving.It is exciting.
B.A lot more people get hurt walking down the street.
C.A lot of people think rock climbing is exciting.