There are five types of germs: ____, viruses, algae, fungi, and protozoa. Germs are so small that we cannot ____ them. To look at germs, we use a ____. ____ means to find out more about something using research or experiments. Not all germs are ____ for us. Some can be helpful to build up our immune system and help us break down food.

Germs

印刷
埋め込み

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?