A:referred to look
B:referred to looking
C:referred to look
D:referring to look
64.8 =x:96 x=____
已知双曲线x2a2-y2b2=1a>0,b>0的离心率e=3,则它的渐近线方程为 ( )
下列句子中,没有语病的一句是( )