Bill can play _________ violin but he can't play _________ chess.
A:the, 不填
B:the, the
C:不填, the
D:a, 不填
上述案例中刘磊为什么要多还款1万元?
如图:点D在△ABC的边AB上,连接CD,下列条件:①∠ACD=∠B;②∠ADC=∠ACB;③AC2=AD•AB;④AB•CD=AC•BC,其中能判定△ACD∽△ABC的共有( )