题目内容
（请给出正确答案）
[单选题]
以下属于吸声材料功能的有（）。
A.传递声能
B.控制噪声
C.控制混响时间
D.改善音质
提问人：网友liuxing686
发布时间：2022-01-07
如搜索结果不匹配，请 
A. 绝热材料
B. 吸声材料
C. 隔声材料
D. 防水材料
题目内容
（请给出正确答案）
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The communication is within business and administration, aiming at a common objective and profits for both the individuals and organizations.
A、lateral communication
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第7题
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第8题
The communication at the same level in an organization.
A、horizontal communication
B、ethnocentrism
C、business communication
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第9题
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