搅拌器的作用是（）。
A.互溶液体的混合
B.不互溶液体的分散和接触
C.固体颗粒在液体中的悬浮
D.强化液体与管壁的传热
参考答案：A, B, C, D
用所给单词的正确填空。
1. I am going to __________ (buy) some gifts.
2. Danny __________ (walk) to the bus stop.
3. It's fun __________ (put) up a Christmas tree.
4. Let's invite Danny __________ (help) us.
5. The star always __________ (go) on top.
6. Everyone __________ (work) hard.
7. Li Ming __________ (clean) the living room yesterday.
8. Jesus taught people __________ (love) God.
9. There are four __________ (season) in a year.
10. Can you __________ (stand) up on the ice?
宏观调控房地产市场中，以合理利用土地、协调城市物质空间布局、指导城市健康有序地发展为己任，对土地开发、利用起指导作用的手段是( )。
A．土地供应政策 B．地价政策C．金融政策 D．城市规划
