三个重要的有关视频图像压缩编码的国际标准是（）。

单项选择题A lot of growing companies only focus _____ one factor, the price, when they are looking for their suppliers. A、with B、on C、in D、fo

单项选择题三个刚片用（）两两相连，组成无多余约束的几何不变体系。