A:水中生活的动物和陆地生活的动物
B:脊柱动物和无脊柱动物
C:辐射对称动物和两侧对称动物
D:变温动物和恒温动物
设实数x,y满足:x+3y+5≥0x+y-1≤0x+2≥0,则z=2x+4y的最小值是( )
A concert will be held ________ the world-famous musician, who will personally play his favourtie music at it.