A:being carried out; to complete
B:carried out; to be completed
C:to be carried out; to complete
D:to be carried out; to be completed
过双曲线x2a2-y2b2=1(a>0,b>0)的右焦点F作圆x2+y2=a2的切线FM(切点为M),交y轴于点P.若M为线段FP的中点,则双曲线的离心率为( )
读一读,翻译下列句子。
AD是△BAC的角平分线,过D向AB、AC两边作垂线,垂足为E、F,则下列错误的是( )