题目

 They gave a banqnet( 宴会)_____the guests from Britain. A. in honour of   B. in an honour of   C. in honour to   D. in honour for 答案:A如图,在Rt△ABC中,∠C=90°,AC=BC,点O在AB上,经过点A的⊙O与BC相切于点D,交AB于点E.(1)求证:AD平分∠BAC;(2)若CD=1,求图中阴影部分的面积(结果保留π).
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