All matter is made of ____ which are constantly ____. These particles can move from place to place without anything moving them. This particles ____, moving from where there is ____ to where there is ____. This movement is known as ____. Single celled ____ can obtain everything they need (____, oxygen, etc) by diffusion.

Diffusion

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?