1.
如图1,在⊙O中,弦AB与CD交于点P,若AB=CD,则$\widehat{AC}$与$\widehat{BD}$的大小关系是( )
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| A. | $\widehat{AC}$=$\widehat{BD}$ | B. | $\widehat{AC}$$>\widehat{BD}$ | C. | $\widehat{AC}$$<\widehat{BD}$ | D. | 不能确定 |