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问题 问答题

简述学前教育科学研究应贯彻的原则。

答案

参考答案：[*]C:\Documents and Settings\Administrator\My Documents\图片\18.jpg

问答题 简答题

控制器在第一、二、三档时电动机转速较低且无变化，扳至第四档时突然加速，故障何在？
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选择题

As a businessman he was a success, but as a husband he was _______ failure, so their marriage ended in _________failure.

A．/ ; /

B．/ ; a

C．a; a

D．a; /
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