My physics teacher said that light__(travel)faster than sound.(请说明原因)

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Myphysicsteachersaidthatlight__(travel)fasterthansound.(请说明原因)Myphysicsteachersaidthatlight__(travel

My physics teacher said that light__(travel)faster than sound.(请说明原因)
My physics teacher said that light__(travel)faster than sound.
(请说明原因)

My physics teacher said that light__(travel)faster than sound.(请说明原因)
travels
例如地球绕着太阳转这些科普知识就是客观真理

travels
说明真理时,句子永远用一般现在时。

travels 这里从句里面的内容表客观真理,故用现在时