根据首字母提示完成下列句子。

1. Our country has set up a lot of m_            research to study the flu of HINI.

2. The pop singer felt proud when she saw many l_            coming to her.

3. Our new head teacher is a k              man in computer programs.

4. You must be careful when you swim in this d_            river.

5. The little girl was crying when she saw her room b_         _ quickly.

材料的（）及（）是决定材料性质的基本因素，要掌握材料的性质必须了解材料的（）、（）与材料性质之间的关系。