Today is Monday. Linda is at school. She has Chinese，English and PE in the morning. She doesn't have Music today. She has Maths and Art in the afternoon. She has Music on Fridays.
如图，⊙O是△ABC的外接圆，AB是⊙O的直径，D是⊙O上一点，OD⊥AC，垂足为E，连接BD.(1)求证：BD平分∠ABC；(2)当∠ODB＝30°时，求证：BC＝OD.
读《王好战，请以战喻》，下面对文章的思想内容分析不正确的一项是( )
给下面句子中加下划线的字，选择正确的读音。
cáng zàng
梵蒂冈图书馆珍藏____了无数中世纪和文艺复兴时期的艺术品。
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