以下属于动态图像信息压缩标准的有（）。
A.JPEG
B.MPEG-1
C.MPEG-2
D.MPEG-4
E.MPEG-7
参考答案：B, C, D, E
烦冤
---_____that he picked up his uncle at the airport?
A．Was it when
B．When it was
C．It was when
D．When was it
