秦末农民战争爆发和秦朝灭亡的共同原因是（    ）

某校九年级两个班，各选派10名学生参加学校举行的“汉字听写”大赛预赛，各参赛选手的成绩如下：

A班：88，91，92，93，93，93，94，98，98，100

B班：89，93，93，93，95，96，96，98，98，99

通过整理，得到数据分析表如下：

（1）直接写出表中a、b、c的值；

（2）依据数据分析表，有人说：“最高分在A班，A班的成绩比B班好”，但也有人说B班的成绩要好，请给出两条支持B班成绩好的理由．

阅读理解

    I am a karate(空手道) player. I still remember my first karate competition. Like other players,

I was very excited about my event. I watched every player's skills so that I could carefully avoid their moves.

    Somehow, I got into the semifinals(半决赛). In the semifinals, I fell down and hurt myself. I still didn't give up, so I fought back and got into finals. After all, getting the gold medal was my dream.

    In the final competition, there were no supporters on my side, as I was a new face. Instead, the crowd was cheering for my opponent(对手). I could hear only my opponent's name.

    I didn't mind the crowd's cheering. I kept one thing in mind: focus, wait and attack. I had confidence in myself, and I knew that no matter how strong my opponent was, I had to give it my best shot and fight well.

    When the time was up, I was leading with a 3—0 score. One thing I learned from that event is, no matter how strong your opponent is, don't think you are weak or strong. Just give your best shot, and you will make your way to success.

    Win or lose, you will gain important experiences. Learn from every step you take.