A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994.If the manufacturer produced 1,000 video cameras in 1993,how many video cameras did the manufacturer produced in 1995?
(1)xy=20
(2)x+y+xy/100=9.2
答案(B)
B充分??我怎么算不出噢!谁知道啊作者: plaudit 时间: 2010-12-15 11:16