______ 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

______ 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