we know sound travels very
we know sound travels very
——Do you know sound travels very fast?——Yes.But light travel
英语单选:——Do you know sound travels very fast?——Yes.But light t
we know ___ travels not so fast as light.
sound travels more slowly than
It ( )that light travels faster than sound
Light travels move quickly than sound?
Light travels faster than sound改为过去式
sound travels through air的中文意思
Light travels much faster than sound.
sound we make sound
翻译We know that light travel much faster than sound.