中日三角比内容比较--以上海教育出版社和数研出版社出版的教科书为例
중일삼각비내용비교--이상해교육출판사화수연출판사출판적교과서위례
Comparison between the Trigonometric Ratio Parts in Chinese and Japanese Text Books--As in Text Books of SEPH and SUKEN
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