患者头晕眼花，少气倦怠，腹部有坠胀感，脱肛，舌淡苔白，脉弱。其证候是
A．气滞B．气虚C．气陷D．气微E．气逆
参考答案：C
材料色散引起的脉冲展宽与什么有关？
I had wanted to take the career of being a model, but I ________ not good at dealing with constant media attention.
A．had been
B．has been
C．am
D．was
