【判断题】【消耗次数：1】
录像机属于听觉教学媒体。
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设球面方程为(x一1)2+(y+2)2+(z一3)2=4，则该球的球心坐标与半径分别为( )
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(一1，2，一3);2
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(一1，2，-3);4
③
(1，一2，3);2
④
(1，一2，3);4
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正确
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