Read and answer. （根据提示或答语补全句子）

1. — Where is the washroom?

    — It's on the _______ floor. (第一层)

2. — _______ is the gym?

    — It's over there.

3. — Is this your music room?

    — Yes, it _______.

4. — Is that your computer room?

    — No, it _______.

理化分析是使用各种现代仪器或传统的容量分析，只能分析组成酒体的（）和（）。