【单选题】听力原文: ABC News and CNN. com plan to start providing video news feeds to Yahoo Inc.'s news site, the companies have announced. CNN. com will offer daily video clips and ABC will offer on-demand video c...
A.
ABC News and CNN. com.
B.
Yahoo Inc.'s news reporters.
【单选题】Which of the following is a British news and cable network?
【简答题】为了了解初三年级某次数学考试成绩情况,教导处对该年级若干名学生的成绩进行了抽查(满分100分,分数取整数).将所得数据整理后,画出了频率分布直方图的一部分(如图).所有数据共分六组. 已知第一、二、四、五、六这五个分数段的频率分别是0.04,0.08,0.28,0.24,0.12,第二小组的频数是4. (1)补全频率分布直方图; (2)这次被抽查的学生人数是多少? (3)被抽查的学生中,及格率是多...