椭圆、双曲线有关切准点的一个性质
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1009-2560|19|4|135-136
ISSN: 1009-2560
Source: 宁波教育学院学报, Vol.19, Iss.4, 2017-01, pp. : 135-136
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Abstract