某镇多年未发现伤寒,某年秋季发现一例伤寒后,在同一街道相继发生了5例二代伤寒病例,这可能是伤寒的一起()。
A.散发
B.爆发
C.流行
D.大流行
E.复发
参考答案:B
. In order to _____ the rising production costs, the subscription rates have been increased.
A.add up to
B.look up to
C.cut short
D.keep up with
硝苯地平中杂质总量为()
A.0.02%
B.0.5%
C.1%
D.1.2%
E.2%