Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1002-4123|volume|4|69-74

ISSN： 1002-4123

Source： 中学数学教学, Vol.volume, Iss.4, 2017-01, pp. : 69-74

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next