I have never talked about my private life with other people.
生物的生殖现象不属于无性生殖的是( )
已知椭圆x2a2+y2b2=1a>b>0与双曲线x2m2-y2n2=1m>0,n>0有相同的焦点-c,0和c,0,若c是a与m的等比中项,n2是2m2与c2的等差中项,则椭圆的离心率为( )