A:came; had visited
B:had come; visited
C:came; have visited
D:had come; have visited
如图,一次函数y=kx+b的图象与反比例函数y= mx (x>0)的图象交于P(n,2),与x轴交于A(﹣4,0),与y轴交于C,PB⊥x轴于点B,且AC=BC.
— Can you ____ (dance)?
— Yes, I can.
植物细胞特有的能量转换器是( )