单项选择题

下面哪个是ISO/IEC没有参与制定的视频编码标准()。
A、H.261
B、MPEG-4
C、MPEG-2
D、H.264/AVC

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0号车用柴油中的“0”表示该柴油的()。
A、十六烷值为不小于0
B、凝点等于0℃
C、凝点不高于0℃
D、冷滤点不高于0℃

单项选择题

The cross-border integration of medicine and literature does not mean the complete disappearance of the boundary between the two, but represents the existence of a threshold space between these two disciplines which crosses the original boundary .
A、正确
B、错误