（2015·湖南）He must have sensed that I ________ him. He suddenly glanced at me and said quietly, "Why a

题干

（2015·湖南）He must have sensed that I ________ him. He suddenly glanced at me and said quietly, "Why are you staring at me like that?"

A：would look at

B：looked at

C：was looking at

D：am looking at

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C

某中学开展“唱红歌”比赛活动，九年级（1）、（2）班根据初赛成绩，各选出5名选手参加复赛，两个班各选出的5名选手的复赛成绩如图所示．

（1）根据图示填写下表；

（2）结合两班复赛成绩的平均数和中位数，分析哪个班级的复赛成绩较好；

（3）计算两班复赛成绩的方差．