— Smart phones are more and more popular now.
— So they are. But they still ________ too much.
A:pay
B:cost
C:take
D:spend
如图,若正方形OABC的顶点B和正方形ADEF的顶点E都在函数y=4x(x>0)的图象上,则点E的坐标是____
“红军不怕远征难,万水千山只等闲”。当年红军“远征”的直接原因是