如图,△ABC中,∠C=90°,CD⊥AB,DE⊥AC,则图中与△ABC相似的三角形有( )
That's the man ________ house was destroyed in the storm.
如果实数x,y满足x-4y+3≤03x+5y-25≤0x≥1,目标函数z=kx+y的最大值为12,最小值为3,那么实数k的值为( )