Through the analysis on the social background, cultural background and media background of sport media grading, the article points out the problems and challenges sport media grading is facing.
通过对体育媒介分层社会背景、文化背景、媒介背景的分析，指出了体育媒介分层所面临的问题和挑战。
Though the newspaper and news website belong to two kinds of news media the media that they use is the same and so there are laws that can be spoken in grading the way.
报纸与新闻网站虽然属于两种新闻媒体，但由于它们使用的媒介有相同之处，因此在编排方式上就有共同规律可言。
The time of X-ray exposure, the amount of contrast media consumed, the TIMI grading after stenting and ST-segment changes of electrocardiogram were compared between two groups.
比较两组介入治疗时平均X线曝光时间、造影剂用量、术后TIMI血流分级和心电图ST段变化。
The time of X-ray exposure, the amount of contrast media consumed, the TIMI grading after stenting and ST-segment changes of electrocardiogram were compared between two groups.
比较两组介入治疗时平均X线曝光时间、造影剂用量、术后TIMI血流分级和心电图ST段变化。
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