桥梁的承重力跟桥梁的（ ）有关。
A：材料
B：形状
C：美观程度
— Jack, what would you like to eat now?
— Oh, mom. I don't feel like ________ anything now. I'm so tired.
的图象经过适当变换可以得到
的图象，则这种变换可以是