CALCULUS PRESENTED BY GUO CHENG GUANG(04-30)
主讲:郭承光(11岁,育民小学五年级)
助讲:郭承曦(8岁,育民小学二年级)
LECTURER:
GUO CHENG GUANG (11 years old, Primary 5 from YUMIN Primary School)
GUO CHENGXI( 8 years old, Primary 2 from YUMIN Primary School)
内容: further differentiation
导数
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E-mail: talentguo001@gmail.com