【单选题】【消耗次数：1】
教科研活动的一般过程是（ ）
①
发现问题—提出假设—了解问题—搜集材料—分析整理材料—得出结论—检验结论
②
发现问题—了解问题—提出假设—搜集材料—分析整理材料—得出结论—检验结论
③
发现问题—了解问题—提出假设—搜集材料—得出结论—分析整理材料—检验结论
④
发现问题—了解问题—提出假设—检验结论—搜集材料—分析整理材料—得出结论
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随机题目
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It was said that his father _________ .
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has died
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died
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has been dead
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I haven’t finished my composition . I ________ for two hours and a half.
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have written it
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wrote it
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leave
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“ Has he seen this film ? ” “Yes. He _________ it several days ago.”
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saw
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has seen
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had seen
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was seeing
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A hunter is a man who __________ animals.
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catch
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catches
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will catch
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was catching
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These children are _________ this year than they were last year.
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moretall
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moretaller
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verytaller
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muchtaller
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Yourroomis _______ thanmine.
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three time big
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threetimesbig
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threetimesbigger
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biggerthreetimes
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This book is ________ that one. But __________ than that one.
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as difficult as ;expensive
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as more difficult as ; more expensive
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as difficult as ; more expensive
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more difficult as ; as expensive
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This box is ________ that one.
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heavy than
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so heavy than
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heavier as
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as heavy as