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【简答题】
电源电压的波动和三极管参数随温度的变化会造成零点漂移,其中______变化是产生零漂的最主要原因。
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【单选题】奥苏贝尔提倡在教学中采用“组织者”这一技术,其精神实质是( )。
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【单选题】奥苏贝尔提倡在教学中采用“先行组织者”这一技术，其精神实质是（）
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【简答题】听句子，选择与你听到的句子意思相同的选项。 (     )1. A. I bought a map because I had been there before. B. I bought a map because I knew Dalian very well. C. I bought a map because I had never been there. D. I bought a ma...
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