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【判断题】
为了减少摩擦阻力,必须把物体做成流线型。( )A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】纯电感电路中,瞬时功率的最大值称为___________,单位是___________。
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