第29题: [单项选择]目前,国际化标准制定的有关视频压缩编码标准中,______主要应用于虚拟现实、远程教育、交互式视频等。 A. MPEG-1 B. 261 C. MPEG-2 D. MPEG-4 参考答案:D 答案解析:[分析] 有关视频编码的标准主要有:MPEG-1是针对于普通电视质量的视频信号压缩,适用于VCD;H.261主要应用于视频通信,如可视电话、会议电视等;MPEG-2提供多种压缩码率,可应用于DVD、1
第30题: [单项选择]According to the passage people Who have experienced ups and downs may become______ . A. nervous when faced with difficulties B. physically and mentally strained C. more capable of coping with adversity D. indifferent toward what happens to them 参考答案:C 答案解析:[解析] 本题属细节性问题。文章中与此题对应的句子是:Many come through periods of stress with more physical and mental vigor t