As the light turned green, I stood for a moment, not _____, and asked myself what I was going to do.

A．moved

B．moving

C．to move

D．being moved

如图是胡萝卜在不同的含氧情况下从硝酸钾溶液中吸收K+和NO3-的曲线。影响A、B两点和B、C两点吸收量不同的因素分别是（）

A.载体数量、能量

B.能量、载体数量

C．载体数量、离子浓度

D.能量、离子浓度