学习了南方地区的地理特征，贝贝整理了一下笔记，其中，有一项有误，请你帮他找出来（　　）

阅读短文, 选择正确的答案。

    Yesterday was Saturday. I visited my aunt with my mother. She was from the USA and came to Beijing last week. She was very happy to see us. My mother said she was thin ten years ago, but now she is fatter. My aunt said I am taller and stronger now. We made a cake together. It was delicious. We were happy.

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在卢沟桥作战中，二十九军组织大刀突击队夺桥，战士们抡起大刀，冲入敌阵，展开激烈的肉搏战，几乎全部战死桥头，烈士的鲜血染红了卢沟桥。音乐家麦新为此作《大刀进行曲》，“……大刀向鬼子们的头上砍去!全国爱国的同胞们，抗战的一天来到了，前面有抗战的正规军，后面有支前的老百姓，我们万众一心共同前进。冲向那敌人，把它消灭!冲啊──大刀向鬼子们的头上砍去!”这首歌成为流传甚广的抗战歌曲。

（1）《大刀进行曲》中的“鬼子们”指的是什么人？

（2）大刀突击队的英勇事迹及《大刀进行曲》体现了怎样的民族精神？

（3）这首歌成为流传甚广的抗战歌曲，在当时起了什么作用？“