
[A1]
四声概念
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Practice Exercises

Multiple Choice
声调标注
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Practice Exercises

Multiple Choice
第一声
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Practice Exercises

Multiple Choice
第二声
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Practice Exercises

Multiple Choice
第三声
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Practice Exercises

Multiple Choice
第四声
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Practice Exercises

Multiple Choice
变调规则
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Practice Exercises

Multiple Choice
轻声本质
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Practice Exercises

Multiple Choice
轻声用法
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Practice Exercises

Multiple Choice
对比要点
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Practice Exercises

Multiple Choice