—I hear Yang Yan made an English speech at the graduation

— ceremony yesterday.   _______and_______     [ ]

A. So she did;so did I      

B. So did she;so I did    

C. So she was;so I was      

D. So was she;so I was

在某种光线环境中，被摄像机摄取的白色物体，在监视器的荧光屏上也呈现正常的白色时，就称摄像机取得了（）。

A.白平衡

B.黑平衡

C.彩色平衡

D.色差平衡