一杯可乐售价1.8元,商家为了促销,顾客每买一杯可乐获一张奖券,每三张奖券可兑换一杯可乐,则每张奖券相当于[ ]
A.0.6元
B.0.5元
C.0.45元
D.0.3元
答案:C
There will be _____ pollution this year than last year.
A.fewer
B.much
C.less
D.many
急性糜烂性出血性胃炎的胃镜检查强调在出血后()
A.12~24h
B.24~48h
C.48~72h
D.24~72h
E.24~36h