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【判断题】
汽车空调暖风系统按热量的来源可以分为余热式和独立式。A.
正确
B.
错误
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【单选题】所谓内接多边形是( )
A.
多边形在圆内，多边形每边的中点在圆上
B.
多边形在圆外，多边形的顶点在圆上
C.
多边形在圆内，多边形的顶点在圆上
D.
多边形在圆外，多边形每边的中点在圆上
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