试题与答案

第一恒磨牙龋病的最好发部位是() A.颊面 B.舌面 C.面 D.邻面 E.根面

题型:单项选择题

题目:

第一恒磨牙龋病的最好发部位是()

A.颊面

B.舌面

C.

D.邻面

E.根面

答案:

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参考答案:A解析:高尚的学习动机的核心是利他主义,学生把当前的学习同国家和社会的利益联系在一起。

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