你认为以下哪些材料最能隔音？选三项。
Choose 3 answers
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骨骼和肌肉传递声音。
Choose 1 answer
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不同的材料比其他材料更好地传输声音。
Choose 1 answer
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填写空白
Select the missing words in the text.
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您认为在哪些地方佩戴听力保护装置是个好主意？
Drag the images into the correct place.
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Answer incorrect
Look at the slide below to work out the answer.
