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1、2013年全国初中数学竞赛试题参考答案一、选择题:(每题7分,共35分)1.【】2.【】3.【】5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve51.【】2.【】二、填空题:(
2、每题7分,共35分)3.4.5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve51.2.3.小明某天在文具店做志愿者卖笔,铅笔每支售4元,圆珠笔每支售7元.开始时他有铅笔和圆珠笔
3、共350支,当天虽然笔没有全部卖完,但是他的销售收入恰好是2013元.则他至少卖出了支圆珠笔.5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve5三、计算题:(每题20分,共80
4、分)1.2.图(一)图(二)图(三)5.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve51.5.1-9,,services,andmakethecitymoreattractiv
5、e,strengtheningpublictransportinvestment,establishedasthebackboneoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve55.1-9,,services,andmakethecitymoreattractive,strengtheningpublictransportinvestment,establishedasthebackbo
6、neoftheurbanrailtransitmulti-level,multi-functionalpublictransportsystem,thusprotectingtheregionalpositionandachieve5