Ladies and gentlemen, attention please! I have important to tell you.
A:nothing
B:something
C:everything
D:anything
等轴双曲线C的中心在原点,焦点在x轴上,C与抛物线y2=16x的准线交于A,B两点,AB=43,则C的实轴长为( )
抑商的观念与政策对中国传统社会产生了重要影响。下列理解错误的是