听力原文:M: Has David found an apartment? W: David wanted to find an apartment for 300 dollars a month, but discovered he had to pay twice that much. Q: How much did David pay for his apartment? (3)
【简答题】某商店决定购进 A 、 B 两种纪念品.若购进 A 种纪念品10件, B 种纪念品5件,需要1000元;若购进 A 种纪念品5件, B 种纪念品3件,需要550元. (1)求购进 A 、 B 两种纪念品每件各需多少元? (2)若该商店决定拿出1万元全部用来购进这两种纪念品,考虑到市场需求,要求购进 A 种纪念品的数量不少于 B 种纪念品数量的6倍,且不超过 B 种纪念品数量的8倍,那么该商店共有几...