正确答案: D

30个

题目：一个不透明的布袋里有30个球，每次摸一个，摸一次就一定摸到红球，则红球有

解析：D

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学习资料的答案和解析：

[单选题]Which of the following information is NoTmedtioned？

Who added the stories.

[单选题]（ ）Is red a strong color or a peaceful color?

A strong color.