题目内容
电荷有规则的定向运动称为电流。凡方向不随时间变化的电流称为_______。
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按燃烧物的特性分，可燃气体燃烧引起的火灾属于_______。
电荷有规则的定向运动称为_______。
Tom Roberts loves to read about stocks. He subscribes to the Los Angeles Times, the New York Times, and Smart Money Magazine. He respects the various publications but places more emphasis on Smart Money magazine because it specializes in investment issues. What behavioral characteristic does Roberts have as the basis for his decision making？
电路中某点相对于参考点的_______称为该点的电位,用V表示。
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