The world is f_ with many interesting sounds.We make sounds by making things m_ tois called vibration.It means moving up and down or forwards and backwards very fast.These vibrations cause the air to vibrate.This makes sound waves.And there are diffe
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![The world is f_ with many interesting sounds.We make sounds by making things m_ tois called vibration.It means moving up and down or forwards and backwards very fast.These vibrations cause the air to vibrate.This makes sound waves.And there are diffe](/uploads/image/z/5805190-46-0.jpg?t=The+world+is+f_+with+many+interesting+sounds.We+make+sounds+by+making+things+m_+tois+called+vibration.It+means+moving+up+and+down+or+forwards+and+backwards+very+fast.These+vibrations+cause+the+air+to+vibrate.This+makes+sound+waves.And+there+are+diffe)
The world is f_ with many interesting sounds.We make sounds by making things m_ tois called vibration.It means moving up and down or forwards and backwards very fast.These vibrations cause the air to vibrate.This makes sound waves.And there are diffe
The world is f_ with many interesting sounds.We make sounds by making things m_ to
is called vibration.It means moving up and down or forwards and backwards very fast.These vibrations cause the air to vibrate.This makes sound waves.And there are different k_ of sounds.Some sounds are soft,some sounds are loud.Soft sounds are made by w_ vibrations,loud sounds are made by strong vibrations.Low sounds are made by slow vibrations and h_ sounds are made by fast vibrations.首字母填空
The world is f_ with many interesting sounds.We make sounds by making things m_ tois called vibration.It means moving up and down or forwards and backwards very fast.These vibrations cause the air to vibrate.This makes sound waves.And there are diffe
1 filled (be filled with)
2 move
3 kinds
4 weak
5 high