______ travel more slowly than light.填voice,sound,noise

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______ travel more slowly than light.填voice,sound,noise
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______ travel more slowly than light.填voice,sound,noise
______ travel more slowly than light.
填voice,sound,noise

______ travel more slowly than light.填voice,sound,noise
sound travels
声音比光的速度传播的慢
描述客观真理时,用一般现在时

b.travels
这是陈述客观真理的,在任何时候都用一般现在时

sound
声音比光传播速度慢得多

sound travel more slowly than light.声比光传播的慢

答案是【sound】,
voice是指人声,语音。
sound则泛指一切声音。
noise则指噪音。
这样看答案就不难得出了吧,即声音传播速度比光慢的多。
望采纳,谢谢