一、根据句意及所给首字母或中文提示,完成下列句子
1.Dried food can be_________(储存)for many months.
2.Special boots are used to walk on the_________(表面)of the planet.
3.A h_______ protects the head and is connected to the air tank.
4.With the d_________of science,our lives have changed a lot.
5.A power pack p____________energy for the spacesuit.