回答下列问题。

1. What colour is China's flag? 

    _______________________.

2. What does China's flag have?

    _______________________.

3. Where is Tian'anmen Square?

    _______________________.

4. What is the capital of China?

    _______________________.

5. What is 故宫 in English?

    _______________________.

在味精生产过程中（包括麸酸）使用了哪些结晶设备？采用真空煮晶锅进行味精的精制，其优点是什么？