挑战习题
1/5单选题
难度:

1.将进货单价为40元的商品按50元出售时,售出500个,经市场调查发现:该商品每涨价1元,其销量减少10个,为了赚8000元,则售价应定为(  )
A 60元
B 80元
C 60元或80元
D 70元
提示1:
IOagueaNrumimOaEj++8jOWPr+W+l+WIqea2pj3moIfku7ct6L+b5Lu377yM5Y2z5Y+v6KGo56S65Ye65q+P5Lu255qE5Yip5ram77yM5YaN5qC55o2u5q+P5Lu255qE5Yip5ramw5fmiYDllK7nmoTku7bmlbA95oC75Yip5ram77yM5Y2z5Y+v5YiX5Ye65pa556iL5rGC6KejLg==
正确答案:Qw==
6Kej77ya6K6+5rao5Lu3eOWFg++8jOWIme+8mjxicj7vvIgxMCt477yJ77yINTAwLTEweO+8iT04MDAw77yMPGJyPjUwMDAtMTAweCs1MDB4LTEweDxzdXA+Mjwvc3VwPj04MDAw77yMPGJyPng8c3VwPjI8L3N1cD4tNDB4KzMwMD0w77yMPGJyPu+8iHgtMjDvvIk8c3VwPjI8L3N1cD49MTAw77yMPGJyPngtMjA9MTDmiJZ4LTIwPS0xMO+8jDxicj7op6PlvpfvvJp4PHN1Yj4xPC9zdWI+PTMw77yMeDxzdWI+Mjwvc3ViPj0xMO+8jDxicj7nu4/mo4DpqozvvIx455qE5YC856ym5ZCI6aKY5oSP77yMPGJyPuaJgOS7peWUruS7t+S4ujUwKzMwPTgw5YWD5oiWNTArMTA9NjDlhYMuIDxicj7mlYXpgIlDLiA=