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下列说法中:①长度相等的弧是等弧;②平分弦的直径垂直于弦;③直径是弦;④同弧或等...
下列说法中:①长度相等的弧是等弧;②平分弦的直径垂直于弦;③直径是弦;④同弧或等弧所对的圆心角相等;⑤在同圆或等圆中,相等的弦所对弧相等;错误的个数为:( )
A.1
B.2
C.3
D.4
考点分析:
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2C.
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下列式子:
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