题目

--Lily has a silk __________. Listen, she is singing in the next room! -- How nice! A. look                     B. noise                    C. voice 答案:C 词语辨析。look可数名词,意思“相貌,样子,外表”,常用复数形式;noise 不可数名词,意思“噪杂声,吵闹声”;voice,可数名词,意思“嗓音,说话声”。故选择C。如图,△ABC内接于⊙O,过C作CD∥AB与⊙O相交于D点,E是CD上一点,且满足AD=DE,连接BD与AE相交于点F.求证:△ADF∽△ABC.
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