题目内容

模拟量是一个连续变化量,它被()表示。

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remain in campus to take courses in summer school. ______

He was not only surprised, but also extremely suspicious, as he had every reason to be.

电路设计的内容首先要确定控制电路的电流种类和()的数值。

有人说关灯1小时也节约不了多少电,根据给定资料4、5所述的“地球1小时”活动谈谈你的看法。(20分)
要求:分析思考全面、合理,表述准确。字数不超过400字。

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