—Amy, could you please tell me something about David Beckham?

—Sorry. I know ______ about him.

A. everything               B. something                C. nothing

通常把生物体内物质代谢过程中所伴随发生的能量的释放、转移和利用称为( )

A．能量代谢
B．基础代谢
C．基础代谢率
D．氧热价