According to the article the mother is finally con

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程序教学设计的关键因素是( )

程序教学设计的关键因素是( ) A.程序教材的编制和教学机器的使用 B.教学范例的编制和先行概念的使用 C.程序教材的编制和教学范例的使用 D.即时强化

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电缆做直流耐压试验时,泄漏电流出现哪些情况,说明电缆绝缘可能有缺陷?

电缆做直流耐压试验时,泄漏电流出现哪些情况,说明电缆绝缘可能有缺陷?

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I wish I[_] longer this morning, but I had to get

I wish I[_] longer this morning, but I had to get up and come to class. A.could

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