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【简答题】
在语文课上，当老师讲到课文中“一千万万颗恒星”一处时，同学问道：“老师，‘万万’是什么意思？”全班同学觉得这个问题太简单，哄堂大笑。也不好意思地低下了头，懊悔自己不该问这么简单的问题。老师见状，问大家：“大家都知道万万等于亿，那么，这里为什么不用亿，而用万万呢？”全班同学的注意力一下子被吸引过来，没有人再发笑了，大家认真地思考起来，并纷纷发表自己的看法。通过讨论，同学们发现，使用“万万”一词，增强了语言的表现力。老师进行了总结，又问大家：“请大家想想，今天这一‘额外’的收获是怎么来的呢？大家要感谢谁呢？请大家用掌声表达对他的谢意。”大家把目光转向同学，为他鼓起掌来。试从教师观的角度，评析老师的教学行为。
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