根据所给单词，连成完整的句子。

原子核 ${}_{90}^{232}$ Th具有天然放射性，它经过若干次α衰变和β衰变后会变成新的原子核．下列原子核中，有三种是 ${}_{90}^{232}$ Th衰变过程中可以产生的，它们是（   ）

    Americans usually eat three meals a day. Breakfast usually comes before eight o'clock in the morning. They usually have eggs, some meat, bread, fruit juice and coffee. Lunch is between twelve and one o'clock. It is like a light meal and working people must take lunch with them or get it near workplace.

    Children in school take sandwiches, fruit and cookies with them or eat in school. Supper, the main meal, is between six and eight in the evening. People cook it carefully. They may have meat or chicken, turkey and duck. They may all have potatoes or rice, vegetables or salad. The drink is coffee, tea or milk. Then comes the dessert.

折叠该图____成正方体；把E面或者____移动到____就能折叠成正方体